Some dogs can be more prone to gain weight than others. Weight problems can be successfully managed through changes in your dog's food Hill's nutritionists & veterinarians have a developed Prescription Diet® w/d® clinical nutrition specially formulated to support your dog's weight management. This irresistible food makes it easier for you to bond with your pet with gently cooked, bite-sized chunks of real chicken & natural ingredients with added vitamins and minerals. This product requires a veterinary prescription.