This weight management and mobility support dog food was created with Hill's unique understanding of the biology of overweight dogs. It provides lean muscle support, and also uses clinically proven antioxidants for a healthy immune system. Over 70% of dogs lost weight within 10 weeks. With added fish oil to provide EPA, an Omega-3, to help support joint function for a mobile & active life. Feed this breakthrough nutrition for your dog's healthy joints & weight maintenance.