Risk Factors for Canine Osteoarthritis: What Every Veterinarian Should Know

Canine osteoarthritis is one of the most common causes of chronic pain and reduced mobility encountered in veterinary practice. While the disease itself represents the final stage of joint degeneration, its development is rarely attributable to a single cause. Instead, multiple factors interact over time, increasing the likelihood of joint damage and the subsequent onset of osteoarthritis. Recognizing these factors allows veterinarians to identify dogs at higher risk, initiate timely monitoring, and guide owners on measures that may help reduce disease progression. Understanding which risk factors are modifiable and which are inherent to the individual dog is an important step toward improving long-term joint health. 

Canine Osteoarthritis is a Multifactorial Disease 

Joint disease develops through the combined influence of genetic, physical, and environmental factors. Six major risk factors consistently emerge in dogs with osteoarthritis and related joint disorders: genetics, breed, conformation, body weight, age, and sex or neuter status. In addition, factors such as feeding practices, exercise during growth, month of birth, and early-life environment also influence disease susceptibility. 

Rather than acting independently, these factors frequently interact, making it important to evaluate each patient as a whole rather than focusing on a single characteristic. 

Inherited Factors Help Identify High-Risk Dogs 

Genetic predisposition is one of the most consistently recognized contributors to canine joint disease. Numerous genetic regions and heritable traits have been associated with osteoarthritis and predisposing arthropathies, particularly conditions affecting the hip, elbow, and cranial cruciate ligament. Certain breeds also demonstrate a consistently higher likelihood of developing joint disorders. 

Larger breeds, including Rottweilers, Golden Retrievers, Labrador Retrievers, German Shepherd Dogs, Bernese Mountain Dogs, Mastiffs, Boxers, and Italian Corso Dogs, have repeatedly been associated with increased risk for various joint conditions^1,2,3,4. Conversely, some smaller breeds show lower susceptibility to particular disorders, although they may remain predisposed to other orthopaedic conditions. 

Breed alone should never be viewed as a diagnosis, but it can provide valuable context when evaluating young dogs or investigating subtle gait abnormalities. 

Body Weight Matters Throughout Life 

Among the modifiable factors, body weight has considerable clinical significance. Increased body weight, whether related to larger body size or excess body condition, places greater mechanical stress on weight-bearing joints and is consistently associated with a higher likelihood of joint disease. 

Dogs classified as overweight were significantly more likely to develop cranial cruciate ligament disease, with obesity increasing the risk almost fourfold (OR 3.8). Increased body weight has also been linked with elbow arthrosis and osteoarthritis^1,2. 

Feeding practices during growth deserve equal attention. Non-restricted feeding has been associated with hip dysplasia and secondary hip osteoarthritis¹, highlighting the importance of maintaining appropriate body condition from an early age. 

Age, Sex and Neuter Status Influence Risk 

Age remains an important consideration, although its interpretation requires caution. Osteoarthritis is more frequently recognized in older dogs, while certain predisposing conditions may occur earlier in life. Conflicting findings for some disorders indicate that age should always be interpreted alongside clinical presentation and underlying joint pathology. 

Sex and neuter status have also been associated with disease susceptibility. Increased risk has been reported in both males and females depending on the specific disorder, while neutered dogs consistently demonstrated a greater likelihood of joint disease across multiple conditions^1,2,5. These relationships are likely influenced by additional factors such as body weight, hormonal changes, and age, reinforcing the need for patient-specific assessment rather than broad generalizations. 

Environmental and Early-Life Influences Should Not Be Overlooked 

Several additional factors contribute to joint health during development. Exercise intensity, exercise type, and early-life management can influence joint loading while the musculoskeletal system is still maturing. Activities such as frequent chasing of balls or toys and regular high-impact play have been associated with increased risk of joint disease, particularly during growth¹. Seasonal differences reflected through month of birth have also been linked with disease occurrence, likely because they influence exercise opportunities during early development. 

Practical Clinical Insights 

Every orthopaedic consultation presents an opportunity to identify dogs that may be at increased risk of osteoarthritis before irreversible joint damage develops. Incorporating breed, body condition, age, reproductive status, lifestyle, and developmental history into routine clinical assessments allows a more comprehensive evaluation of future joint health. While inherited characteristics cannot be altered, modifiable factors such as maintaining appropriate body weight, appropriate feeding practices, and balanced exercise remain valuable areas for client education and long-term preventive care. Recognizing how multiple risk factors interact enables veterinarians to make more informed clinical decisions and tailor recommendations to each individual patient. 

References 

1. Anderson KL, Zulch H, O'Neill DG, Meeson RL, Collins LM. Risk factors for canine osteoarthritis and its predisposing arthropathies: a systematic review. Frontiers in veterinary science. 2020 Apr 28;7:220. https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2020.00220/full 

2. Adams P, Bolus R, Middleton S, Moores AP, Grierson J. Influence of signalment on developing cranial cruciate rupture in dogs in the UK. Journal of Small Animal Practice. 2011 Jul;52(7):347-52. https://www.fecava.org/wp-content/uploads/2019/09/Summer-2013.pdf#page=54 

3. Hou Y, Wang Y, Lu X, Zhang X, Zhao Q, Todhunter RJ, Zhang Z. Monitoring hip and elbow dysplasia achieved modest genetic improvement of 74 dog breeds over 40 years in USA. PloS one. 2013 Oct 4;8(10):e76390. https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0076390&type=printable 

4. Lavrijsen IC, Heuven HC, Meij BP, Theyse LF, Nap RC, Leegwater PA, Hazewinkel HA. Prevalence and co-occurrence of hip dysplasia and elbow dysplasia in Dutch pure-bred dogs. Preventive veterinary medicine. 2014 May 1;114(2):114-22. https://www.sciencedirect.com/science/article/pii/S0167587714000385 

5. Torres de la Riva G, Hart BL, Farver TB, Oberbauer AM, Messam LL, Willits N, Hart LA. Neutering dogs: effects on joint disorders and cancers in golden retrievers. PloS one. 2013 Feb 13;8(2):e55937. https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0055937&type=printable