Companion Animals

Dog Immune-Mediated Polyarthritis Welfare

Immune-mediated polyarthritis causes joint inflammation in multiple joints simultaneously, resulting in pain and mobility impairment.

Key Facts

IMPA can be idiopathic or secondary to infection, neoplasia, or drugs
Affected dogs show shifting leg lameness, fever, and joint swelling
Synovial fluid analysis is required for definitive diagnosis
Corticosteroids are the primary treatment, often with additional immunosuppressants
Many dogs require long-term or lifelong therapy to prevent relapse

Welfare Considerations

Dogs with IMPA experience significant joint pain across multiple limbs, reducing their ability to move, play, and engage in normal activities. Treatment with immunosuppression typically produces rapid improvement in comfort. Monitoring for relapse and managing long-term medication side effects are important welfare considerations.

What You Can Do

Seek veterinary evaluation promptly for unexplained shifting lameness and fever
Follow prescribed immunosuppressive protocols carefully
Monitor for gastrointestinal side effects of steroid therapy
Work with your vet to find the lowest effective maintenance dose
Provide comfortable bedding and ramps to assist mobility during treatment