LIMITED INGREDIENT DIET: Carefully formulated for Gut health, digestive health and sensitive stomachs. These are key to natural immunity. Limited Ingredient Diet ideal for food sensitivities. Grain-Free Formula. SKIN & COAT: All-natural Duck meat with absolutely no duck by-products, sourced from France and the USA. An excellent source of protein for healthy muscles, skin, coat, and proper body function. ALL BREEDS & LIFE STAGES: Every kibble is designed for puppies, adult dogs and senior dogs of small & large breeds to live and be healthy TRUSTED BY ALL: Trusted by top trainers, breeders, police K9 units and military working dogs. VETERINARIAN APPROVED: Based on 40 years of research by Dr. George C. Fahey, the leading expert in gut health.