Hill's Prescription Diet Metabolic + Mobility Dry Dog Food is specially formulated by nutritionists & veterinarians to help with weight loss and maintenance and joint health. Prescription Diet Metabolic + Mobility Dry Dog Food is clinically proven nutrition to help dogs naturally lose weight by activating their metabolism and improve mobility in as little as 21 days. This dry food is made with chicken and has an irresistible taste that makes it easier for pet parents to comply with your recommendation. Nutrition proven to help dogs lose weight in 2 months.Synergistic blend of ingredients and nutrients naturally works with your dog's unique energy use for easy and effective weight loss.Helps keep lost weight off and provides energy for active play.High levels of omega-3s from fish oil support your dog’s ability to run, walk and jump.Helps your dog feel full and satisfied between meals.