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Rhodesian Ridgeback

The Rhodesian Ridgeback is a large, athletic dog breed originating from Southern Africa, renowned for its distinctive ridge of hair along the spine that grows forward in opposition to the rest of the coat, serving as the breed's hallmark feature.^[1] Developed in the late 19th century in what was then Rhodesia (now Zimbabwe), this versatile hound was bred from indigenous ridged dogs of the Khoikhoi people crossed with European breeds such as Greyhounds, Terriers, and Bulldogs to produce a resilient hunter capable of tracking and harassing large game, including lions, without direct confrontation.^[2] The breed's name was officially adopted in 1922 at a meeting in Bulawayo, reflecting its regional origins and unique physical trait, though it was earlier known as the African Lion Dog.^[2] Physically, the Rhodesian Ridgeback embodies strength and symmetry as a muscular, active hound with a balanced build, standing 24 to 27 inches tall at the shoulder and weighing 70 to 85 pounds, with males typically larger than females.^[3] Its short, dense, and glossy coat ranges from light wheaten to red wheaten, requiring minimal grooming, while the ridge must be symmetrical, tapering from just behind the shoulders to a point midway between the root of the tail and the prominences of the hips, with two identical crowns (whorls) directly opposite each other at the start.^[1] The head features a deep muzzle, dark eyes, and high-set ears, contributing to its alert and dignified expression, and the overall structure supports efficient movement for endurance and speed in the field.^[3] In temperament, the Rhodesian Ridgeback is even-tempered, affectionate, and loyal to its family, yet reserved and protective toward strangers, with an independent streak that demands firm, patient training and early socialization.^[1] Originally tasked with guarding homesteads, fending off baboons, and pursuing antelope alongside hunters like Cornelius van Rooyen in the 1870s, the breed's strong prey drive persists today, making it suited for active owners who provide ample exercise through running or canine sports.^[2] Recognized by the American Kennel Club in 1955 and placed in the Hound Group, it has evolved into a devoted companion while retaining its historical prowess.^[1]

History

Origins

The Rhodesian Ridgeback traces its ancient origins to the semi-domesticated ridged dogs kept by the Khoikhoi (also known as Hottentot) people of southern Africa, particularly in regions encompassing modern-day Namibia and South Africa during the 16th and 17th centuries. These dogs, valued for their distinctive ridge of backward-growing hair along the spine, served as hunting companions and guardians, assisting in tracking game and protecting livestock and villages from predators in the harsh veldt environment. Historical accounts from European explorers, such as Peter Kolben's 1719 description in Caput Bonae Spei Hodiernum, document these ridged Khoikhoi dogs near the Cape of Good Hope, noting their resilience and utility in local tribal life.^[2]^[4] With the arrival of European settlers, including Dutch Boers and later British colonists in the mid-17th century, crossbreeding began to enhance the native dogs' physical attributes for greater utility in colonial expansion. Settlers interbred the Khoikhoi ridged dogs with imported European breeds such as Mastiffs, Greyhounds, Bloodhounds, and Great Danes, aiming to combine the ridge trait with increased size, speed, endurance, and scenting ability. This selective mixing produced dogs better suited to the demands of frontier life, including protection against wildlife like leopards and baboons, while preserving the ridge as a dominant characteristic. Early engravings, such as those in David Livingstone's 1857 Missionary Travels and Researches in South Africa, depict these ridged dogs in Khoikhoi possession, illustrating their role in hunting and herding amid extreme climatic conditions.^[2]^[5]^[4] In the late 19th century, missionaries played a key role in disseminating these ridged dogs northward. Reverend Charles D. Helm, a Protestant missionary born in 1844, introduced two ridged bitches named Powder and Lorna to his Hope Fountain mission station near Bulawayo in what is now Zimbabwe in 1875, transporting them from the Cape Province via ox-wagon. These dogs, likely products of the earlier crossbreeding efforts, were integrated into local packs and contributed to the breed's foundational stock in the region. This introduction marked a pivotal moment in the dogs' spread, setting the stage for their adaptation to broader hunting roles in Southern Africa.^[2]^[6]^[5]

Development in Southern Africa

In the late 19th century, breeders in Southern Africa, particularly Cornelius van Rooyen, a prominent big-game hunter operating in Matabeleland (now part of Zimbabwe), played a pivotal role in refining the Rhodesian Ridgeback through selective breeding. Van Rooyen, who began his efforts around 1879, crossed ridged dogs brought by Reverend Charles Helm—such as the females Powder and Lorna—with his existing pack, incorporating influences from breeds like Greyhounds, Pointers, and Bulldogs to enhance traits suited for lion tracking. These dogs were developed to work in packs of two to three, harassing and holding lions at bay to allow hunters to approach safely, rather than engaging in direct combat, debunking the myth of them as outright "lion hunters."^[2]^[7]^[8] On farms and plantations across the region, these dogs proved invaluable for their versatility, flushing out game like antelope and partridge, herding livestock such as oxen, and guarding against predators including baboons and leopards. Their adaptability to diverse terrains, from the dense bushveld to open savannas, made them essential for settlers navigating challenging environments during the Great Trek migrations of the 1830s. The Ridgeback's stamina enabled it to cover vast distances silently during hunts, conserving energy and avoiding detection by wary prey.^[2]^[8]^[9] Through European settler communities, the breed spread northward from the Cape Colony into Southern Rhodesia (modern Zimbabwe), South Africa, and Northern Rhodesia (now Zambia), where it was prized for its endurance and quiet demeanor in pursuit of game. Building on earlier Khoikhoi roots, these dogs became a staple among Boer and British colonists by the early 20th century. Amid varying local strains resulting from isolated breeding, efforts by regional hunters and owners focused on promoting consistent physical and working traits, such as the distinctive ridge and athletic build, to ensure reliability in hunting packs.^[7]^[9]^[10]

Breed Standardization

The formal standardization of the Rhodesian Ridgeback began in 1922 when veterinarian F.R. Barnes drafted the first breed standard in Bulawayo, Southern Rhodesia (now Zimbabwe), modeling it on the Dalmatian standard to codify the breed's distinctive traits and conformation.^[11] This document emphasized the dog's athletic build, ridge formation, and utility as a hunter, drawing from local breeding practices among European settlers. The standard was subsequently approved by the South African Kennel Union (SAKU, now Kennel Union of Southern Africa) in 1926, marking the breed's official recognition within the region and establishing guidelines for registration and shows.^[11] The breed's international presence emerged shortly thereafter, with the first exhibition occurring in Britain at the Crystal Palace Show in London in 1928, where examples were presented by Mrs. Edward Foljambe, introducing the Ridgeback to European audiences beyond Africa.^[12] This event highlighted the breed's exotic appeal and laid groundwork for wider acceptance. By the mid-20th century, global kennel clubs formalized recognition: the Fédération Cynologique Internationale (FCI) accepted the Rhodesian Ridgeback on a definitive basis on February 21, 1955, assigning it standard number 146 in Group 6 (Scenthounds and Related Breeds).^[13] The American Kennel Club (AKC) followed later that year, admitting the breed to its stud book in November 1955 as its 112th recognized breed in the Hound Group.^[14] Originally referred to as the "Rhodesian Lion Dog" in early records to reflect its historical role in lion hunting, the breed's name was officially changed to "Rhodesian Ridgeback" by SAKU in 1928 to emphasize the characteristic dorsal ridge rather than its predatory function.^[4] Following Zimbabwe's independence in 1980 and the renaming of Rhodesia, the breed retained its established name without alteration, as kennel organizations prioritized continuity in breed identity over geopolitical shifts.^[15] Early importations to the United States and Europe significantly aided the breed's global establishment, with notable figures facilitating its spread. In the 1930s, actor Errol Flynn became one of the first to import and breed Rhodesian Ridgebacks in America, acquiring his initial dogs from an English breeder and whelping litters on his California ranch, which helped introduce the breed to North American enthusiasts.^[16] These efforts, combined with post-World War II exports from Southern Africa, supported the formation of dedicated clubs, such as the Rhodesian Ridgeback Club of the United States in 1950, and expanded the breed's footprint across continents.^[17]

Culling of Ridgeless Puppies

In the early development of the Rhodesian Ridgeback breed, breeders commonly culled ridgeless puppies at birth to maintain the ridge as the breed's hallmark trait, a practice that affected roughly 25% of litters from parents carrying the recessive ridgeless genotype. This approach was prevalent from the breed's formal standardization in the 1920s through much of the mid-20th century, as breeders sought to eliminate variations that deviated from the ideal conformation.^[18] The rationale for culling stemmed from the ridge's deep cultural and functional roots in the Khoikhoi heritage of southern Africa, where ridged dogs were prized for their perceived hunting prowess and symbolic status, making the trait indispensable for preserving breed purity and identity. European settlers and early breeders in Southern Africa adopted this selective elimination to reinforce the ridge as a genetic and aesthetic essential, viewing ridgeless individuals as unfit for perpetuating the lineage.^[2] By the post-1950s era, evolving animal welfare standards prompted a shift away from culling toward more humane alternatives, such as sterilization or rehoming ridgeless puppies as non-breeding companions. Contemporary codes of ethics from major Ridgeback clubs, including the Rhodesian Ridgeback Club of the United States (RRCUS), now mandate sterilization for ridgeless puppies if placed in homes, explicitly discouraging euthanasia to prioritize welfare while upholding breed standards. Similarly, the Ridgeback Club of Great Britain updated its policies in the early 21st century to emphasize rehoming with spay/neuter contracts over destruction, reflecting broader ethical reforms in pedigree dog breeding.^[19]^[18]^[20] This historical culling significantly constrained the breed's effective population size by routinely discarding viable puppies, potentially limiting genetic diversity and exacerbating health risks tied to the ridge gene. It also sparked early controversies within kennel clubs, such as debates in the Kennel Club (UK) and Fédération Cynologique Internationale affiliates over the ethics of selective euthanasia, culminating in welfare critiques that pressured clubs to adopt non-lethal protocols and monitor breeder compliance.^[18]

Physical Characteristics

General Conformation

The Rhodesian Ridgeback exhibits a large, muscular, and athletic build designed for endurance, featuring a deep chest, straight back, and powerful legs that support efficient movement over long distances.^[3]^[21] According to the American Kennel Club (AKC) breed standard, males measure 63-69 cm (25-27 inches) at the withers, while females stand at 61-66 cm (24-26 inches); the Fédération Cynologique Internationale (FCI) standard aligns closely with these heights.^[3]^[21] The breed maintains balanced proportions, with leg length slightly exceeding body length to emphasize agility and speed rather than bulk.^[3]^[21] Typical weights range from 70-85 pounds (32-39 kg), with males heavier than females. The AKC desirable weight is 85 pounds (38.6 kg) for males and 70 pounds (31.8 kg) for females, while the FCI lists 36.5 kg (80 lb) for males and 32 kg (70.5 lb) for females.^[22]^[3]^[21] The head is characterized by a broad, flat skull, moderately oblique almond-shaped eyes that convey alertness, and pendulous ears set high and tapering to rounded points.^[3]^[21] The tail is thick at the base, tapering to a fine point with a gentle upward curve, never forming a curl or sickle shape.^[3]^[21] In movement, the Rhodesian Ridgeback displays a free-striding gait with good reach and drive, maintaining a level topline that underscores its capability for long-distance tracking and coursing.^[3]^[21] Breed standards disqualify or heavily fault structural deviations such as overshot or undershot bites and cow-hocks, which compromise the dog's functional symmetry and efficiency.^[3]^[21]

The Ridge

The ridge is the defining hallmark of the Rhodesian Ridgeback, consisting of a symmetrical band of hair that grows in the opposite direction to the rest of the coat along the spine.^[3] This feature extends from immediately behind the shoulders to a point between the hip bones, forming a clearly defined stripe that tapers toward the haunches.^[21]^[23] According to official breed standards, the ridge must exhibit precise symmetry and structure, including exactly two identical crowns (whorls) positioned directly opposite each other.^[3] The lower edges of these crowns should not extend beyond one-third of the ridge's total length, ensuring a balanced and proportional appearance.^[21] An ideal ridge measures approximately 5 cm (2 inches) in average width, though it naturally narrows as it tapers.^[23] Deviations, such as asymmetry, incorrect whorl placement, or more or fewer than two crowns, are considered serious faults.^[3] Both the Fédération Cynologique Internationale (FCI) and the American Kennel Club (AKC) mandate that the ridge be a prominent and correctly formed feature for breed recognition, with ridgeless dogs strictly disqualified from conformation events.^[21]^[3] This trait traces its origins to the ridged hunting and guardian dogs kept by the Khoikhoi people of southern Africa, where early European settlers selectively bred for it due to observed survival advantages in ridged individuals during hunts.^[24]

Coat and Coloration

The Rhodesian Ridgeback possesses a short, dense coat that lies close to the body, appearing sleek and glossy but never woolly or silky.^[3] This coat structure requires minimal grooming, with weekly brushing recommended to remove loose hair and maintain its shine.^[1] The breed experiences moderate seasonal shedding, which is more noticeable during transitions to warmer weather as the coat adapts to temperature changes.^[25] Acceptable coat colors range from light wheaten to red wheaten, with the wheaten shades required to be clear without excessive black hairs or overlay.^[21] A dark mask on the muzzle and ears is permissible, adding contrast to the overall wheaten tone.^[23] Limited white markings are allowed only on the chest, toes, and tail tip, while excessive white on the belly or above the toes is undesirable; brindling, solid black, or black-and-tan patterns are disqualifying faults.^[3] This coloration palette, combined with the short coat, suits the breed's origins in hot Southern African climates while offering some protection against varied weather conditions.^[26]

Temperament and Behavior

Personality Traits

The Rhodesian Ridgeback is renowned for its loyalty and affection toward family members, forming strong bonds with those it trusts while displaying a dignified and even-tempered demeanor.^[1] These dogs are highly intelligent yet fiercely independent, often exhibiting a strong-willed nature that stems from their historical role as autonomous hunters.^[1] They tend to be aloof with strangers, maintaining a reserved vigilance without showing aggression or shyness.^[27] Derived from their big-game hunting heritage, Rhodesian Ridgebacks possess a high prey drive, which manifests in strong chasing instincts toward small animals like squirrels or cats, necessitating secure enclosures during off-leash time.^[1] Despite this, they serve as protective guardians of their home and loved ones, alerting owners to potential threats with a discriminating bark rather than excessive vocalization.^[28] Their protective instincts are balanced, making them reliable without unnecessary aggression.^[1] When raised alongside children from puppyhood, Rhodesian Ridgebacks can be gentle and tolerant companions, though their large size and playful energy require supervision to prevent accidental knocks.^[1] They maintain a moderate energy level, enjoying play and exercise while remaining somewhat reserved in social settings.^[28] Overall, these dogs thrive on established routines and mental stimulation; without it, their stubborn streak may emerge, leading to willful behavior.^[1] Vocalizations are minimal, with barking typically limited to purposeful alerts rather than frequent noise.^[28]

Training and Socialization

Rhodesian Ridgebacks require firm, consistent training using positive reinforcement methods starting from puppyhood, as their independent and sometimes stubborn nature can make them challenging to handle otherwise.^[28] Negative training techniques are unsuitable and may exacerbate behavioral issues.^[28] With proper guidance, including weekly obedience classes and daily practice sessions, they excel in dog sports such as obedience, agility, and lure coursing, where their athleticism and focus shine.^[1]^[29]^[30] Crate training is also recommended for puppies to aid in housebreaking and providing a secure space.^[28] Early and extensive socialization is essential for Rhodesian Ridgebacks to mitigate their natural aloofness toward strangers and strong prey drive, ensuring they develop into well-adjusted companions.^[28] Exposing puppies to a variety of people, animals, sounds, and environments during their critical developmental period—ideally through structured puppy classes—helps prevent fear-based reactivity and promotes confidence.^[1] This lifelong process is crucial, as insufficient socialization can lead to protective or destructive tendencies.^[28] Due to their strong-willed temperament and high energy levels, Rhodesian Ridgebacks are best suited for experienced owners who can provide dedicated time and leadership, rather than novice handlers who may struggle with their independence.^[28] With appropriate preparation and training, they can perform well in roles such as therapy dogs or search-and-rescue partners, contributing through programs that recognize their versatility.^[30] To prevent boredom-induced destructiveness, Rhodesian Ridgebacks need 1-2 hours of vigorous daily exercise, such as running, hiking, or interactive play, in addition to mental stimulation from training.^[28] A securely fenced yard is advisable to accommodate their prey drive and allow safe off-leash activity.^[28]

Genetics

Ridge Formation

The ridge in the Rhodesian Ridgeback forms during embryonic development through a genetic mechanism involving a 133 kb duplication on canine chromosome 18, which includes the genes FGF3, FGF4, FGF19, and ORAOV1. This duplication results in increased expression of these fibroblast growth factor genes, leading to altered dermal patterning along the dorsal midline and causing hair follicles in that region to orient and grow in the forward direction, opposite to the surrounding coat. The process occurs during a critical phase of skin and neural tube development in utero, where the gene dosage effect disrupts normal follicle polarity.^[31] The resulting ridge manifests as a distinctive strip of hair extending from the withers to the root of the tail, characterized by a chevron-shaped pattern that tapers symmetrically.^[27] At its widest point behind the shoulders, the ridge features two identical, oppositely placed whorls known as crowns, which mark the reversal points of hair growth direction.^[27] This pattern is fully evident at birth, as the ridge is present on newborn puppies, reflecting its completion during late embryonic stages.^[32] Postnatally, the ridge continues to mature, becoming more defined and prominent by 2 to 4 weeks of age as the puppy's coat grows.^[33] Variations in crown symmetry or ridge alignment, stemming from subtle differences in embryonic gene expression, can influence the aesthetic quality assessed in breed shows, though the core formation remains consistent across individuals carrying the dominant ridge allele.^[27] This inheritance pattern, where a single copy of the mutated allele produces the ridge, underscores the developmental specificity of the trait.^[34]

Inheritance and Testing

The ridge trait in Rhodesian Ridgebacks follows an autosomal dominant inheritance pattern, resulting from a 133 kb duplication on chromosome 18 that includes genes such as FGF3, FGF4, FGF19, and ORAOV1.^[35] A single copy of the mutant allele (R) produces the ridge phenotype, while dogs homozygous for the normal allele (rr) are ridgeless. In matings between two heterozygous ridged dogs (Rr × Rr), approximately 75% of puppies are expected to be ridged (50% Rr and 25% RR), with 25% ridgeless (rr).^[35] Homozygous ridged dogs (RR) exhibit the trait but carry a higher genetic load for associated developmental anomalies compared to heterozygotes.^[34] The ridge mutation is associated with an increased risk of certain spinal issues, such as dermoid sinus, through its influence on embryonic neural tube development; however, a 2022 study indicates that the duplication responsible for the ridge is not identical to the hypothesized locus for dermoid sinus, though the traits remain correlated in the breed.^[35]^[36] Genetic testing for the ridge allele became commercially available in 2015, allowing breeders to distinguish between heterozygous (Rr) and homozygous (RR) ridged dogs via a simple buccal swab sample.^[34] Laboratories such as GenoCan offer this PCR-based assay with high accuracy (over 99%) for copy number detection, enabling litter outcome predictions and informed mating decisions.^[37] In breeding practice, testing helps avoid pairings of two homozygous ridged dogs, which can result in up to 25% of embryos or fetuses not surviving to term due to developmental complications, leading to smaller litter sizes.^[38] Ridgeless puppies, once commonly culled, are now typically sterilized and placed in pet homes under codes of ethics from organizations like the Rhodesian Ridgeback Club of the United States (RRCUS), promoting ethical welfare and genetic diversity.^[19]

Health

Dermoid Sinus

The dermoid sinus is a congenital defect in Rhodesian Ridgebacks characterized by epithelial-lined tracts extending from the skin surface to the spinal canal or deeper tissues, arising from incomplete separation of the neural tube from the overlying ectoderm during embryonic development.^[39] This condition is strongly associated with the breed's characteristic dorsal ridge, which results from an autosomal dominant mutation involving duplication of fibroblast growth factor genes (FGF3, FGF4, and FGF19), predisposing affected dogs to neural tube defects like the sinus. The mutation's incomplete penetrance means not all ridged dogs develop sinuses, but homozygous ridge genotypes carry a significantly higher risk.^[40] Prevalence of dermoid sinus in Rhodesian Ridgebacks varies by population and lineage, with studies reporting rates from 2.5% to 5.3% overall in large cohorts of puppies, though incidence can reach 3-20% in certain bloodlines.^[41]^[42] Sinuses are often multiple, typically occurring along the dorsal midline from the neck to the lower back, and may be superficial or extend deeply toward the spinal cord.^[43] Symptoms generally manifest as palpable lumps or dimples along the spine, which may drain serous or purulent fluid if infected, leading to recurrent dermatitis or abscesses.^[32] Deeper tracts can cause serious complications, including bacterial meningitis, myelitis, or neurological deficits such as ataxia, hindlimb paresis, dysmetria, and hyperesthesia if the sinus communicates with the central nervous system.^[44] Untreated infections or spinal involvement can result in progressive paralysis or sepsis.^[43] Diagnosis begins with thorough physical palpation of the dorsal midline to identify tracts, often confirmed by advanced imaging such as magnetic resonance imaging (MRI) to assess depth, spinal involvement, and associated anomalies like spina bifida.^[45] Surgical exploration may be required for definitive diagnosis in ambiguous cases.^[39] Treatment involves complete surgical excision of the sinus tract under general anesthesia, combined with broad-spectrum antibiotics based on culture and sensitivity if infection is present; prophylactic surgery is recommended for all identified cases, especially prior to breeding, to prevent complications.^[43] Success rates are high in uncomplicated cases without neurological signs, with full resolution achieved in most dogs when the tract is fully removed, though recurrence or incomplete excision can necessitate reoperation.^[43] Prevalence is notably higher in lines with intense selection for the ridge phenotype, prompting breed clubs to advocate routine physical examinations of puppies and breeding stock.^[32] While no fully reliable genetic test exists for direct prediction, some laboratories offer assays for ridge-associated risk factors to guide breeding decisions, and affected dogs should not be bred to reduce transmission.^[46]^[43]

Degenerative Myelopathy

Degenerative myelopathy (DM) is a late-onset, progressive neurodegenerative disease affecting the spinal cord in dogs, including the Rhodesian Ridgeback, characterized by hind limb weakness, ataxia, and eventual paralysis due to the loss of myelin and axons in the white matter.^[47] The condition is strongly associated with a missense mutation in the superoxide dismutase 1 (SOD1) gene (c.118G>A), which is inherited in an autosomal recessive manner with incomplete penetrance, meaning not all homozygous dogs develop clinical signs.^[48] In Rhodesian Ridgebacks, the mutant A allele has an estimated frequency of 28%, resulting in approximately 9% of the population being homozygous (A/A) and thus at high risk for DM.^[49] Clinical signs typically emerge in dogs aged 8 years or older, beginning with subtle hind limb incoordination, such as knuckling or dragging of the paws, swaying of the hindquarters, and difficulty rising or turning.^[47] Over 6 to 12 months, the disease progresses to severe ataxia, muscle wasting, and complete hind limb paralysis, with some affected dogs eventually experiencing urinary or fecal incontinence and, in advanced stages, forelimb involvement.^[50] The Rhodesian Ridgeback's large size may accelerate progression compared to smaller breeds.^[47] Diagnosis of DM in Rhodesian Ridgebacks relies on a combination of clinical history, neurological examination, and genetic testing to identify the SOD1 mutation, with homozygous A/A dogs classified as high risk (DM/DM).^[47] Additional diagnostics, such as cerebrospinal fluid (CSF) analysis, magnetic resonance imaging (MRI), or ruling out differential conditions like intervertebral disc disease, are essential for presumptive antemortem confirmation, as definitive diagnosis requires postmortem histopathology.^[50] There is no cure for DM, and management focuses on supportive care to maintain quality of life, including physical therapy, non-steroidal anti-inflammatory drugs for pain, and mobility aids like wheelchairs or slings.^[51] For breeding Rhodesian Ridgebacks, genetic testing is recommended to identify carriers (N/DM genotype, heterozygous G/A), as mating two carriers carries a 25% chance of producing affected (DM/DM) offspring; breeders should avoid such pairings to reduce DM incidence in the population.^[47] Heterozygous dogs can be bred to clear (N/N, homozygous G/G) mates without risk of affected puppies, though ongoing monitoring of allele frequencies is advised given the mutation's persistence in the breed.^[49]

Hypothyroidism

Hypothyroidism in the Rhodesian Ridgeback is primarily caused by autoimmune thyroiditis, also known as lymphocytic thyroiditis, which leads to progressive destruction of the thyroid gland and insufficient production of thyroid hormones.^[52] This condition is one of the most prevalent health issues in the breed, with studies showing positive thyroglobulin autoantibodies (TgAA), a marker of autoimmune thyroiditis, in approximately 16.8% of tested Rhodesian Ridgebacks.^[53] Genetic research has identified a shared risk haplotype on canine chromosome 12, encompassing genes LHFPL5, SRPK1, and SLC26A8, that predisposes the breed to this disorder, independent of the dog leukocyte antigen (DLA) class II region.^[54] Common symptoms include lethargy, unexplained weight gain despite normal appetite, recurrent skin infections such as pyoderma, bilateral hair loss (alopecia) starting from the trunk and tail, and reproductive issues like infertility in both males and females.^[55]^[56] These signs typically manifest between 2 and 5 years of age, though subclinical disease can occur earlier, and the condition often presents with dermatologic abnormalities before overt metabolic changes.^[57] Diagnosis involves comprehensive blood testing, including measurement of total thyroxine (T4), free T4, thyroid-stimulating hormone (TSH), and screening for thyroid autoantibodies such as TgAA to confirm autoimmune etiology.^[57] The Orthopedic Foundation for Animals (OFA) recommends initial thyroid evaluation at 12 months of age, with periodic retesting thereafter—ideally annually for at-risk breeds like the Rhodesian Ridgeback—to monitor progression from subclinical to clinical hypothyroidism.^[58] Genetic screening for the associated risk haplotype can identify carriers, complementing thyroid antibody tests for breeding decisions.^[54] Treatment consists of lifelong oral supplementation with levothyroxine (L-thyroxine), a synthetic thyroid hormone, administered daily to restore normal metabolic function.^[59] Dosage is adjusted based on follow-up blood tests every 4-6 weeks initially, then every 6-12 months once stable, with most dogs showing rapid improvement in symptoms within 1-2 months.^[57] The prognosis is excellent with early intervention and consistent therapy, allowing affected dogs to lead normal lives; however, untreated advanced cases can progress to life-threatening myxedema coma characterized by severe hypothermia, bradycardia, and coma.^[59]

Gastric Dilatation Volvulus

Gastric dilatation-volvulus (GDV), commonly known as bloat, is a life-threatening condition in dogs where the stomach rapidly fills with gas, fluid, or food and may twist on its axis, obstructing blood flow and leading to shock, tissue damage, and potentially death if untreated.^[60] This syndrome is particularly prevalent in large, deep-chested breeds such as the Rhodesian Ridgeback, which shares anatomical predispositions like a narrow waist and elongated thorax that facilitate stomach rotation.^[61] Studies indicate that the cumulative lifetime incidence of GDV across all dog breeds is approximately 5.7%, but it rises significantly in large and giant deep-chested breeds, with some exhibiting 2 to 3 times the average risk due to body conformation. In a 2017 health survey of Rhodesian Ridgebacks conducted by the Rhodesian Ridgeback Club of the United States, bloat was reported as the most common digestive issue, affecting about 2.4% of the 2,897 dogs surveyed.^[62] Symptoms of GDV typically onset suddenly and include a visibly distended abdomen, unproductive retching or attempts to vomit, excessive salivation, rapid or labored breathing, restlessness, weakness, pale gums, and collapse.^[63] The condition progresses rapidly, often within hours, as the twisted stomach compromises circulation to vital organs, including the heart and spleen.^[64] Without immediate veterinary intervention, mortality rates range from 10% to 30%, even with aggressive treatment, due to complications like cardiac arrhythmias, stomach necrosis, or peritonitis.^[60]^[61] Key risk factors for GDV in Rhodesian Ridgebacks include genetic predisposition from family history, large single meals, rapid eating, exercise or stress immediately after feeding, and older age.^[63] Male dogs and those with nervous temperaments also face elevated risks.^[61] Emergency treatment involves stabilizing the dog with intravenous fluids and pain management, followed by decompression via stomach tubing or needle aspiration, and surgical intervention to untwist the stomach, assess for necrosis, and perform a gastropexy to anchor the stomach to the abdominal wall, preventing recurrence.^[60] Gastropexy is highly effective, reducing recurrence risk from up to 80% to less than 5%.^[63] Preventive measures for Rhodesian Ridgebacks emphasize dietary and lifestyle modifications, such as dividing daily food into multiple small meals fed from slow-feeder bowls to discourage gulping, avoiding vigorous activity for at least one hour post-meal, and minimizing stress during feeding.^[64] Elevated feeding bowls should be avoided, as research links them to increased GDV risk. Prophylactic gastropexy is strongly recommended for at-risk dogs, often performed concurrently with spay or neuter procedures in puppies or young adults.^[60] Emerging research on the canine gut microbiome suggests that probiotics may support digestive health and potentially lower GDV susceptibility by promoting balanced bacterial populations, though they are not a standalone preventive strategy.^[65] Responsible breeding to select against familial GDV history further aids in reducing breed-wide incidence.^[62]

Hip Dysplasia

Hip dysplasia is a common orthopedic condition in Rhodesian Ridgebacks, characterized by abnormal development of the hip joint where the ball and socket do not fit properly, leading to joint instability, degeneration, and eventual osteoarthritis.^[66] This malformation results from a combination of genetic and environmental factors, causing pain and reduced mobility as the dog ages.^[67] The prevalence in the breed is estimated at 15-20%, with one study reporting 16.2% of evaluated Rhodesian Ridgebacks affected (grade >A on hip scoring).^[68] According to Orthopedic Foundation for Animals (OFA) data, the dysplastic rate is approximately 12%, though selective breeding has contributed to gradual reductions over time.^[69] Symptoms typically appear between 4 months and 12 months of age but can worsen progressively, including intermittent or persistent hind limb lameness, a "bunny-hopping" gait during running, reluctance or pain when rising from a resting position, and decreased exercise tolerance.^[70] These signs often exacerbate with obesity, rapid growth, or excessive high-impact activity during puppyhood, leading to muscle atrophy and joint inflammation over time.^[71] Diagnosis involves radiographic evaluation, with X-rays recommended at around 2 years of age for accurate assessment once skeletal maturity is reached.^[72] Methods include the OFA standard view, which grades hips as excellent, good, fair, borderline, mild, moderate, or severe dysplastic, or the PennHIP protocol for earlier distraction indexing to predict risk.^[71] The condition has a genetic basis with heritability estimates ranging from 0.2 to 0.4 in dogs, indicating moderate inheritance influenced by multiple genes.^[67] Management focuses on conservative measures to alleviate symptoms and slow progression, including maintaining ideal body weight through controlled diet, moderate low-impact exercise, and joint supplements such as glucosamine and chondroitin sulfate.^[66] For severe cases, surgical options like total hip replacement (THR) can restore function and eliminate pain.^[71] In breeding programs, screening parental hip scores via OFA or equivalent is essential to reduce incidence, prioritizing dogs with fair or better ratings.^[73]

Notable Individuals

Famous Owners

The Rhodesian Ridgeback has attracted a diverse array of notable owners, from early 20th-century breeders to modern celebrities, whose involvement helped elevate the breed's profile globally. One of the earliest influential figures was Francis Richard Barnes, a British veterinarian in Southern Rhodesia (now Zimbabwe), who owned and worked with Ridgebacks in the 1910s and 1920s while developing the breed's first formal standard in 1922.^[74] Barnes' efforts in documenting and standardizing the breed through his personal dogs laid the foundational recognition for Ridgebacks within kennel clubs.^[8] In the mid-20th century, Hollywood actor Errol Flynn became a pioneering owner and breeder in the United States, importing the first Ridgebacks from an English breeder in the late 1930s and raising them on his California ranch.^[16] Flynn's enthusiasm for the breed, sparked during a 1930s African hunting trip with Ernest Hemingway, introduced Ridgebacks to American audiences and spurred early interest among U.S. enthusiasts.^[75] His ownership significantly boosted the breed's visibility and popularity in the West, contributing to the establishment of the first American Ridgeback club in 1947.^[16] Among contemporary owners, Princess Charlene of Monaco has been a prominent advocate, owning a Rhodesian Ridgeback named Khan since adopting the puppy from South Africa in 2021; as of November 2025, she and Prince Albert maintain at least one Ridgeback alongside their other pets.^[76] Her public appearances with the dog, including charity events for animal welfare, have highlighted the breed's loyal temperament.^[77] Actor Patrick Swayze was renowned for his devotion to Rhodesian Ridgebacks, owning multiple over his lifetime, including Cody in the 1980s, Kwetu's Jazz Bizzaro acquired in 1988, and Kumasai in 2009.^[78] Swayze often featured his Ridgebacks in personal photographs and described them as integral to his family life on his New Mexico ranch.^[79] Actor and former athlete Isaiah Mustafa, best known for Old Spice commercials, has owned Rhodesian Ridgebacks since at least 2010, including a female named Lexi and a male named General "Buck."^[80] Mustafa has praised the breed's intelligence and friendly demeanor in interviews, noting Lexi's appeal during walks.^[81] The visibility of these owners has played a key role in enhancing the Rhodesian Ridgeback's popularity, with figures like Flynn accelerating its importation and recognition in new regions, while modern celebrities continue to showcase the breed's versatility and appeal.^[16]

Ridgebacks in Media and Culture

The Rhodesian Ridgeback has appeared in several films depicting African adventures, most notably in the 1993 Disney production A Far Off Place, an adaptation of Laurens van der Post's novels. In the movie, the loyal dog Hintza, a central companion to the young protagonists on their perilous journey across the Kalahari Desert, was portrayed by three Rhodesian Ridgebacks trained for the role, highlighting the breed's endurance and protective instincts in rugged terrains.^[82] The film underscores the dog's historical association with African landscapes, though the story is set in the early 20th century when the breed was still emerging. In literature, the Rhodesian Ridgeback features prominently in Laurens van der Post's semi-autobiographical novels A Story Like the Wind (1972) and its sequel A Far Off Place (1974), where the character Hintza serves as a faithful guide and protector to the protagonist François in the Kalahari region. These works draw on the author's experiences in southern Africa, portraying the Ridgeback as a symbol of resilience and deep human-animal bonds amid colonial-era challenges.^[83] The novels have contributed to the breed's image as an emblem of African wilderness lore, influencing perceptions beyond factual breed histories. Culturally, the Rhodesian Ridgeback holds significance as a symbol of southern African heritage, particularly in South Africa and Zimbabwe, where it originated as a versatile hunting and guardian dog adapted to the region's harsh environments. In Zimbabwe, the breed's centennial was celebrated in 2022, recognizing its roots in early 20th-century Bulawayo and its role in local farming and wildlife interactions.^[15] In South Africa, it ranks among the most popular breeds and was designated the Kennel Union of Southern Africa's "Dog of the Year" in 2002, reflecting its integration into national identity and everyday life.^[84] The Fédération Cynologique Internationale notes its practical use in a few African game parks for tracking in conservation programs, aiding efforts to monitor wildlife without direct confrontation.^[7] Breed clubs worldwide promote the Rhodesian Ridgeback through competitive events that showcase its athleticism and heritage. Organizations like the Rhodesian Ridgeback Club of the United States (RRCUS) and the American Kennel Club (AKC) host conformation shows and lure coursing trials, where the dogs chase a mechanical lure over distances simulating hunts, emphasizing speed, agility, and instinct.^[85] These events, including junior courser tests and open stakes, foster community engagement and preserve the breed's working traits.^[86] In modern media, Rhodesian Ridgebacks gain visibility through viral online videos of their performances in agility competitions, where their power and focus captivate audiences. Clips from events like those organized by RRCUS often highlight the breed's ability to navigate obstacle courses with precision, amassing millions of views on platforms like YouTube and contributing to its reputation as a versatile, family-oriented athlete.^[87]

References

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Rhodesian Ridgeback Dog Breed Information - American Kennel Club
Breed Standard: A description of the ideal dog of each recognized breed, to serve as an ideal against which dogs are judged at shows, originally laid down by a ...
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Rhodesian Ridgeback History: Hunting Lions & Fending Off Baboons
Sep 28, 2020 · These ridged dogs were hardy and had a seemingly innate ability to survive encounters with African predators, in particular lions.
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[PDF] Official Standard of the Rhodesian Ridgeback General Appearance
Disqualifications: Solid black. Black and tan, or brown and tan in brown/liver nosed dogs. Ridgelessness.
[4]
History of Rhodesian Ridgeback - LUANDA kennel
1719- A.D. First mention of ridged dogs owned by the Khoikhoi (Hottentots) near Cape town described by Kolben in Hawley. He wrote: There is also another kind of ...
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ORIGINS OF THE BREED - Glenaholm Rhodesian Ridgebacks
The Mesopotamian Hunting Dog was brought down the east coast of Africa in the course of tribal migration over several centuries and part of the movement was ...
[6]
ORIGINS OF THE BREED - H l u h l u w e
The Rhodesian Ridgeback originated in South Africa, developed from a domesticated dog with a ridge found with Khoisan tribes, and selective breeding by ...
[7]
[PDF] “Ridgebacks hunt lion” they say… No they didn't - FCI
A hunter, by the name of Cornelius van. Rooyen, who operated ... Van Rooyen crossed several breeds to create his African Lion Hound because.<|control11|><|separator|>
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History of the Rhodesian Ridgeback
These “Ridgebacks” were used as functional, all purpose, guard and hunting dogs and it was found that they surpassed any other breed when hunting lions. “ ...
[9]
HISTORY - The Southern Rhodesian Ridgeback Association
The Rhodesian Ridgeback is presently the only registered breed indigenous to southern Africa. Its forbears can be traced to the Cape Colony of southern Africa.
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Rhodesian Ridgeback: traits, characteristics, health - KingPet
"Rhodesian" refers to Rhodesia, the historical region in Southern Africa that is now Zimbabwe and Zambia. It was here that early European settlers bred ...<|separator|>
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The breed standard
The original standard, which was drafted by F R Barnes, in Bulawayo, Rhodesia, in 1922, was based on that of the Dalmatian and was approved by the South African ...
[12]
RHODESIAN RIDGEBACK EU MAGAZINE ISSUE 11/2022 ... - Issuu
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RHODESIAN RIDGEBACK - FCI
RHODESIAN RIDGEBACK (146) ; Date of publication of the standard ; English, RHODESIAN RIDGEBACK, 6/6/2025 ; Français, CHIEN DE RHODESIE A CRETE DORSALE, 6/6/2025.
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Breeds by Year Recognized - American Kennel Club
Nov 20, 2024 · The chart below lists all AKC recognized breeds and the year they first became registrable with the AKC. ... 1955 – Rhodesian Ridgeback. 1959 – ...
[15]
The Rhodesian Ridgeback Centennial | Zimbabwe Absurdity
Jul 10, 2022 · Yes, we have our own dog breed, known as the Rhodesian Ridgeback, since 1922 when the parent club of the breed was formed in the country.
[16]
Facts About the Rhodesian Ridgeback That You May Not Know
Aug 15, 2024 · The breed standard details acceptable colors as “light wheaten to red wheaten.” AKC is a participant in affiliate advertising programs ...
[17]
The Rhodesian Ridgeback Club of the United States
At the time that Ridgebacks were recognized by the American Kennel Club (1955), there was in existence a club known as the Rhodesian Ridgeback Club of ...
[18]
[PDF] Pedigree dog breeding in the UK: a major welfare concern? - RSPCA
Ridgeback Club of Great Britain 2008). Until relatively recently they also recommended that ridgeless puppies be culled. In merle (see glossary) coloured ...
[19]
Code of Ethics - The Rhodesian Ridgeback Club of the United States
When puppies with serious defects or faults (Dermoid Sinus, ridgeless) are sold the breeder must take the extra responsibility to see that the dog is sterilized ...
[20]
[PDF] RRCGB CODE OF ETHICS
Ridgeless puppies should be re-homed with registration documents, at rearing costs only, with a contract that it will be spayed /castrated within a stipulated ...
[21]
[PDF] RHODESIAN RIDGEBACK - FCI
that of the Dalmatian and was approved by the South African Kennel. Union in 1926. GENERAL APPEARANCE: The Rhodesian Ridgeback should represent a well ...
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Breed Standards : Rhodesian Ridgeback | United Kennel Club (UKC)
The Rhodesian Ridgeback is a symmetrical, well balanced, strong, muscular dog, yet it must be active and agile, and capable of great endurance with a fair ...
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Why Does the Rhodesian Ridgeback Have a Ridge?
Jun 17, 2023 · Ideally, the ridge should be clearly defined, tapering, and symmetrical. It should start immediately behind the shoulders and continue to a ...
[24]
Rhodesian Ridgeback Dog Breed Health and Care - PetMD
Aug 30, 2024 · The Rhodesian Ridgeback size reaches 70–85 pounds and stand 24–27 inches high at the shoulder. They are muscular, powerful, and athletic. Also ...Missing: range | Show results with:range<|control11|><|separator|>
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Rhodesian Ridgeback Dog Breed and Characteristics
In terms of weather adaptability, their short coat and origins from the warm climates of southern Africa mean they favor hotter conditions. They can bask in ...
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Rhodesian Ridgeback | Breed Standards - The Kennel Club
Apr 1, 2025 · This Breed Standard for the Rhodesian Ridgeback is the guideline which describes its ideal characteristics, temperament, appearance and ...Missing: range | Show results with:range
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Life With A Ridgeback - RRCUS
They are hunting dogs and have a high prey drive. Translation: They are quite independent–they don't fawn over your every word, they can be oblivious to being ...
[28]
'Thorin' Represents Rhodesian Ridgebacks at AKC Obedience Classic
Dec 12, 2023 · rhodesian ridgeback · AKC Obedience ... Covering day 1 to 18 months; get essential info about puppy health, training, socialization and more.<|control11|><|separator|>
[29]
Legacy Versatility Certificate Program - RRCUS
The purpose of the RRCUS Versatility Certificate program is to encourage participation and acknowledge the accomplishments of Rhodesian Ridgebacks as a ...<|control11|><|separator|>
[30]
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The thesis presents studies on the inheritance of the dorsal hair ridge and Dermoid Sinus (DS) in Rhodesian Ridgeback dogs.
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Rhodesian Ridgeback - Dermoid Sinus - UFAW
Salmon Hillbertz (2005) also reports culling of affected (but otherwise healthy) individuals as puppies by some breeders who discover the condition, along with ...<|control11|><|separator|>
[32]
The big genetics experiment - Rhodesian Ridgeback Pedigree Search
It is presumably the presence of multiple copies of one or more of these genes that is responsible for formation of the ridge during embryonic development, by a ...
[33]
Development and validation of a diagnostic test for Ridge allele ...
Jan 27, 2015 · The breed-defining dorsal ridge in Rhodesian Ridgeback dogs is the result of a 133000 base pair duplication on chromosome 18.Missing: timeline embryonic
[34]
Autosomal dominant mutation causing the dorsal ridge predisposes ...
The ridge is inherited in an autosomal dominant mode and predisposes for dermoid sinus. The frequency of ridgeless offspring in the Swedish Rhodesian ridgeback ...
[35]
Ridge predisposition | GenoCan.eu
The ridge formation in Rhodesian and Thai Ridgeback is caused by mutation (duplication of stretch of DNA sequence including several genes).Missing: embryonic lethal
[36]
[PDF] Ridge Gene - Camelot Rhodesian Ridgebacks
Jun 28, 2017 · However, dogs with ridges can be either homozygous dominant. (RR) or ... lethal genetic defect. So when we breed the first generation ...
[37]
(PDF) Dermoid sinuses: Description, diagnosis, and treatment
Aug 5, 2025 · A previous study of the Rhodesian ridgeback population reported an overall prevalence of dermoid sinus of 5.3% and that it is considered ...
[38]
[PDF] Duplication of FGF3, FGF4, FGF19 and ORAOV1 causes hair ridge ...
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[39]
Prevalence and segregation analysis of dermoid sinus in Rhodesian ...
Overall prevalence of dermoid sinus in 12,700 puppies was 2.53%. In 1269 litter with only ridged animals, prevalence was 2.81%. In 46 litters, segregation of ...Missing: causes symptoms treatment
[40]
Dermoid Sinus in dogs - DiploVets
Jun 14, 2021 · The incidence in Rhodesian Ridgebacks ranges from 3% to 20% of the population. Diagnosis: Targeted, thorough palpation of the skin from the ...
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Dermoid Sinus - American College of Veterinary Surgeons
Dermoid sinus is most common in Rhodesian ridgebacks, in which it is congenital and heritable. Therefore, affected pets should not be bred. The condition ...
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Skin: dermoid sinus in Dogs (Canis) | Vetlexicon
Cause: genetic epidermo-neural tube defect. Signs: Rhodesian Ridgeback most commonly affected. Varies from minor to severe, with neurologic signs.Missing: crest formation
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Two cases of type 1 dermoid sinus in Rhodesian ridgebacks are described, with emphasis on the use of magnetic resonance imaging (MRI) in the diagnosis and ...
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LABOKLIN has culminated in the development of a genetic test targeting a risk factor associated with Dermoid Sinus (DS) in Rhodesian Ridgebacks.
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Degenerative Myelopathy (DM) - Veterinary Genetics Laboratory
Degenerative myelopathy (DM) is an inherited neurologic disorder of dogs characterized by gradual muscle wasting and loss of coordination typically beginning ...
[46]
Genome-wide association analysis reveals a SOD1 mutation in ...
Feb 24, 2009 · Genome-wide association analysis reveals a SOD1 mutation in canine degenerative myelopathy that resembles amyotrophic lateral sclerosis.
[47]
Breed Distribution of SOD1 Alleles Previously Associated with ...
Most of the dogs with histopathologically confirmed degenerative myelopathy were SOD1:c.118A homozygotes, but 8 dogs with histopathologically confirmed ...
[48]
Degenerative Myelopathy in Dogs - VCA Animal Hospitals
Degenerative myelopathy (DM) is a disease that affects the spinal cord in dogs, resulting in slowly progressive hind limb weakness and paralysis.Missing: prevalence | Show results with:prevalence
[49]
Degenerative myelopathy | Cornell University College of Veterinary ...
The clinical signs of DM may include: Difficulty rising. Hind limb weakness. Incoordination. Muscle loss. Scuffed toenails on hind limbs. Diagnosis.Missing: prevalence | Show results with:prevalence
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Lymphocytic Thyroiditis - It's Not Just Hypothyroidism
Lymphocytic thyroiditis is the Rhodesian Ridgeback's most common health disorder. It is an autoimmune disease (1-4). Most people refer to it as “hypothyroidism, ...
[51]
A Laboratory Survey of Autoimmune Thyroiditis and Hypothyroidism ...
Positive TgAA results were found in a total of 16.8% of Rhodesian ridgebacks, 11.5% of borzoi, 12.8% of saluki and 3.1% of the greyhound samples.
[52]
A Multi-Breed Genome-Wide Association Analysis for Canine ... - NIH
Aug 11, 2015 · This breed-shared risk haplotype includes three genes (LHFPL5, SRPK1 and SLC26A8) and does not extend to the dog leukocyte antigen (DLA) class ...
[53]
Hypothyroidism | Cornell University College of Veterinary Medicine
Most common signs · Lethargy, dullness, decreased activity level · Weight gain · Cold intolerance.
[54]
Thyroid Disease in Dogs: Causes, Signs, and Treatments - MedVet
Oct 11, 2024 · Common signs include weight gain, lethargy, skin and coat problems, cold intolerance, reproductive issues, anemia, high blood cholesterol, and ...
[55]
Canine Hypothyroidism: Diagnosis and Treatment
Primary hypothyroidism resulting from idiopathic thyroid gland atrophy or immune-mediated lymphocytic thyroiditis is the most common diagnosis.Missing: Rhodesian Ridgeback
[56]
Thyroid | OFA
The date of last routine vaccination should be noted on the OFA application, and dogs should not be tested within 30 to 60 days of their last vaccination.Missing: Rhodesian Ridgeback
[57]
Hypothyroidism in Dogs | VCA Animal Hospitals
... Diagnosis is made by a series of blood tests. Treatment is oral thyroid hormone replacement and is lifelong. Clinical signs and blood hormone levels must be ...Missing: Rhodesian Ridgeback
[58]
Bloat: Gastric Dilatation and Volvulus in Dogs | VCA Animal Hospitals
Can GDV be prevented? Gastropexy (surgical attachment of the stomach to the body wall) is the most effective means of prevention. In high-risk breeds, some ...Missing: Rhodesian Ridgeback
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2017 Health Survey Results - RRCUS
Oral Melanoma - 7. Digestive - Top 5. Bloat - 69; Pancreatitis - 62; Megaesophagus - 37; Cleft Palate - 15; Gastric Ulcers - 6. Endocrine - Top 5.
[61]
Gastric dilatation volvulus (GDV) or “bloat”
Risk factors · Large breed size · Deep-chested dogs · A first-degree relative with GDV · Eating too quickly · Feeding once daily or a large volume of food per meal ...Missing: Rhodesian Ridgeback
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Gastric Dilatation-Volvulus (GDV) in Dogs - PetMD
Dec 16, 2024 · How To Prevent GDV in Dogs · Dogs should be fed multiple small meals in a day rather than one large meal. · Consider using a puzzle feeder or mat ...Missing: Rhodesian Ridgeback
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The canine gut microbiome is associated with higher risk of gastric ...
Jun 11, 2018 · We found no significant association of dietary intake and GDV. Dogs with GDV showed a significant expansion of the rare lineage Actinobacteria ( ...
[64]
Hip Dysplasia in Dogs | VCA Animal Hospitals
Weakness and pain in the hind legs are the usual clinical signs. The dog appears wobbly and is reluctant to rise from a sitting or lying position. Some dogs ...I Have Been Told That My Dog... · What Causes It? · What Symptoms Should I Look...Missing: Rhodesian Ridgeback
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Feb 27, 2025 · Studies have shown that heritability estimates range from 20% to 60%, depending on the breed1-3. This means that a significant portion of the ...
[66]
[PDF] Prevalence of lumbosacral transitional vertebrae and association ...
Oct 29, 2025 · Canine hip dysplasia (CHD; grade > A) was diagnosed in 16.2% (325/2 012) of Rhodesian. Ridgebacks. Statistically, no significant association.
[67]
The Orthopedic Foundation for Animals Hip Dysplasia Database - VIN
Rhodesian Ridgeback. Ex % Dys % Total dogs. 13.9 11.8 1123 ; Rottweiler. Ex % Dys % Total dogs. 4.3 23.4 5901 ; Samoyed. Ex % Dys % Total dogs. 8.3 13.4 3767.
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Hip Dysplasia in Dogs: Signs, Symptoms, Treatment
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Jun 25, 2024 · Hip dysplasia is a condition that occurs during the growth stage in dogs. It results in hip joints that don't fit together well and are looser than normal.Not Sure Whether To See A... · How Do You Treat Dog Hip... · Medical ManagementMissing: Rhodesian Ridgeback
[70]
Hip Dysplasia - OFA
The OFA classifies hips into seven different categories: Excellent, Good, Fair (all within Normal limits), Borderline, and then Mild, Moderate, or Severe (the ...Hip Grade Details · Hip International Ratings Matrix · Hip Screening ProceduresMissing: Rhodesian Ridgeback
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Health Screenings
Hip dysplasia affects many breeds to varying degrees. The size of the breed has little to do with the disease. The biggest contributing factor is the abnormally ...<|control11|><|separator|>
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About Ridgebacks
The original standard was drafted by F R Barnes, in Bulawayo, Rhodesia, in 1922, was based on that of the Dalmatian and was approved by the South African Kennel ...
[73]
The Swashbuckler Who Introduced a Breed
Apr 19, 2020 · It was while Errol was on a hunting in Africa with Ernest Hemingway that he was exposed to Rhodesian Ridgebacks. He purchased his first ...Missing: 1940s | Show results with:1940s
[74]
https://www.rhodesianridgeback.org.za/rrif/About_Ridgebacks.html
[75]
Princess Charlene, a lifelong dog lover - Monaco Tribune
Nov 22, 2024 · Today, Princess Charlene has four dogs in her life: three Chihuahuas and a Rhodesian Ridgeback named Khan. In an interview with Gala, she ...
[76]
PATRICK SWAYZE AND HIS RIDGEBACKS - H l u h l u w e
His first Rhodesian hound, Kwetu's Jazz Bizzaro, was born at the end of 1988 in Chicago, in the kennel of Barbara Sawyer Brown, who revealed to us the story of ...
[77]
The Dirty Dancer's Dogs - National Purebred Dog Day
Oct 28, 2021 · Patrick was a purebred dog owner, and in 2009, he posed with his wife, Lisa, their Poodle, Lucas, and their Rhodesian Ridgeback puppy, Kumasai (aka “Kuma”) at ...
[78]
Isaiah 'Old Spice Guy' Mustafa's 10 secrets to being the man
Aug 8, 2010 · “I've got a 3-year-old Rhodesian ridgeback named Lexi. She's smart. People always want to stop and pet her because her face is so friendly ...
[79]
Isaiah Mustafa has style beyond Old Spice - Los Angeles Times
Nov 7, 2010 · Isaiah Mustafa has style beyond Old Spice. ... Rhodesian ridgebacks careening across his path. Advertisement.
[80]
https://www.nydailynews.com/2010/08/08/isaiah-old-spice-guy-mustafas-10-secrets-to-being-the-man/
[81]
A Story Like the Wind and A Far-Off Place | The Thinking Dog
May 14, 2012 · A Story Like the Wind is not strictly a dog book, but, since one of the central characters is a magnificent Rhodesian ridgeback, Hintza, ...
[82]
Dogs and Dogma: a discussion of the socio-political construction of ...
52Today, the Rhodesian Ridgeback is one of the most popular dogs in South Africa and was KUSA's symbol of the zyxwvuts year in ~ 0 2 . ~ ~ 48. 49.
[83]
Lure Coursing - The Rhodesian Ridgeback Club of the United States
Lure Coursing events take place as tests or trials. Tests are non-competitive and meant to test the instincts of a dog with a pass/fail outcome (i.e., AKC ...
[84]
Lure Coursing - American Kennel Club
Lure coursing clubs should be aware of the following: Clubs are ... Rhodesian Ridgeback · Saluki · Scottish Deerhound · Sloughi · Whippet. Miscellaneous ...Single Stakes Results · Get Started · National Lure Coursing... · Eligible Breeds
[85]
Rhodesian ridgeback and agility? Why not! :) - YouTube
May 5, 2014 · Competition agility "Velká Chuchle-7 jarní cena". Judge: Máčková Jiřina Classes: Agility, agility trial, jumping Music: Enrique Iglesias ...