Our Duck Formula provides complete protein, Omega-3 fatty acids, and essential vitamins and minerals for a healthy and wholesome diet. It is a limited ingredient, a single protein formula that is balanced with fruits and vegetables to provide powerful antioxidants, dietary fiber, and low glycemic carbohydrates. Our Duck Formula is also grain-free and chicken free, perfect for those canines that have food sensitivities. Zignature® Duck Formula – Learned from Nature, Crafted to Perfection. Physiologically Tuned™, limited ingredient premium food for dogs. Hypoallergenic meat first recipe, with no Corn, Wheat, Soy, Dairy, or Chicken, Chicken Eggs, or Chicken By-Products. Zignature® Duck Formula for dogs is formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for all life stages, including growth of large size dogs (70 lbs or more as an adult).