Some dogs can be more prone to gain weight than others. Even a little extra weight can impact the pets quality of life and relationship with family because that extra weight can reduce play time, impact mobility and affect the lifelong general health of your dog. Weight problems can be successfully managed through changes in your dog's food.Hill's nutritionists & veterinarians developed Prescription Diet w/d clinical nutrition especially formulated to support your dog's weight management. In fact, w/d is clinically tested nutrition for conditions that respond to fiber.Why We Love ItTherapeutic L-carnitine levels and an optimal blend of soluble & insoluble fiberLow fat and caloriesReduced magnesium and sodium with clinically proven antioxidants