What is Osteoarthritis in Cats

Osteoarthritis (OA), also called degenerative joint disease, occurs in cats when the joint surfaces become uneven, leading to the bones in the joint rubbing together, causing pain and inflammation. It’s much more common (and severe) in older cats.  

OA can be primary (without an obvious underlying cause, where the disease may be due to mechanical ‘wear and tear’ in the joints) or secondary to a joint injury or abnormality.   

Some factors may increase the risk of arthritis in cats such as certain breeds are more prone to develop hips dysplasia, patellar luxation.

Written by Dr. Mariella Roberts, Veterinary Surgeon, Animal Trust Vets CIC | Published August 2025 | Review date August 2027 | This advice is for UK pets only and is not a replacement for seeing a vet