What weight-management strategy is appropriate for an obese senior dog with osteoarthritis?

• A. High-calorie diet to support joint lubrication.
• B. Calorie-restricted diet that preserves lean muscle mass, portion control, increased low-impact exercise, and gradual weight loss with regular monitoring of body condition score.
• C. Exercise-only without dietary change.
• D. Rapid, aggressive weight loss with strict fasting.

Answer: (B)

Managing weight in an obese senior dog with osteoarthritis relies on reducing joint load while preserving muscle and overall health. The best approach is a calorie-restricted diet designed to promote gradual weight loss while maintaining lean body mass, paired with portion control, increased low-impact activity, and regular monitoring of body condition.

Why this works: trimming calories creates the deficit needed for fat loss, which lowers the mechanical stress on arthritic joints and can lessen pain and improve mobility. Preserving lean muscle is crucial in older dogs because muscle supports joints, aids stability, and helps keep a healthy metabolic rate. A diet formulated for weight management helps ensure the dog gets essential nutrients even as calories are reduced. Low-impact exercises like swimming, walking on soft surfaces, or water therapy burn calories without overloading painful joints, making it easier to stay active consistently. Gradual weight loss minimizes the risk of muscle loss, nutritional gaps, or metabolic adaptation and allows the body to adjust safely. Regular monitoring using body condition scores and veterinary oversight lets you fine-tune the plan, ensuring the pace is appropriate for age, OA severity, and any other health issues.

Why the other approaches aren’t ideal: a high-calorie diet would perpetuate obesity and joint pain; exercising alone without dietary change rarely creates enough energy deficit for meaningful weight loss; rapid, aggressive weight loss or fasting can cause muscle loss and nutritional deficiencies and is risky in seniors with OA.