Hill's nutritionists & veterinarians developed Prescription Diet d/d clinical nutrition specially formulated to support your dog's food sensitivities. In fact, d/d is clinically tested nutrition to help avoid adverse food reactions. How it works: Limited ingredient nutrition with single intact animal protein Free from soy protein High levels of Omega-3 fatty acids Clinically proven antioxidants How it helps: Helps improve digestion & stool quality Visible improvement in skin & coat Helps maintain a healthy skin barrier Supports a healthy immune system Additional info: Hill's Prescription Diet d/d Dry Dog Food provides all the nutrition your dog needs. Please consult your veterinarian for further information on how our Prescription Diet foods can help your dog to continue to enjoy a happy and active life.