Hill's Prescription Diet r/d Weight Reduction is a dry dog food for clinically obese dogs who need rapid, controlled weight loss under veterinary supervision. More aggressive than Metabolic, it's reserved for cases where weight is actively harming the dog's health.

Lower fat and calorie density combined with high fibre create a strong satiety signal so dogs feel full on smaller portions. Increased L-carnitine helps the body burn fat for energy rather than store it, while controlled protein preserves lean muscle through the loss. Complete vitamin and mineral fortification means no nutritional gaps during the calorie restriction.

Vets prescribe r/d when weight loss is clinically urgent — often before surgery, alongside diabetes management or to relieve severe joint pain. It's not a long-term maintenance diet; once the target weight is reached, dogs typically transition to Metabolic for ongoing weight control.