Our Trout and Salmon Meal Formula dog food come from the chilly water of the Northwestern United States. This grain free dog food is a great source of protein and heart-friendly Omega-3 fatty acids, making this the best dog food for your pup. Trout and Salmon are good for younger pups with any pet food allergy, making this formula a good start for elimination diets and a fantastic puppy food. The healthiest pet food for your pup is grain free, full of powerful antioxidants, and is rich in low glycemic carbohydrates, making this formula the healthiest dog food on the market. 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. AAFCO stands for Association of American Feed Control Officials. Zignature recipes are formulated to meet all the nutritional levels established by the AAFCO Dog Food Nutrient Profiles. This certifies that Zignature is a nutritionally complete product that can be fed to your pet as its sole ration without adding any other substance except water. We use a limited ingredient formula because in most cases simple is best. Zignature is formulated to serve your canine companions needs by delivering the highest quality, well balanced diets. Our limited ingredient formula uses No Potatoes, No Grain, No Chicken, No Eggs, No Glutens, No Tapioca, No Corn, & No Soy. Our Single Animal Protein Formulas are extremely palatable, encouraging a healthy appetite and providing high-quality protein for strong muscles.