Ingredients Chicken livers - are an excellent source of high-quality protein. Packed with Iron making them a great food choice for preventing iron deficiency anemia in dogs Chicken hearts -are packed with protein and a unique set of nutrients. Along with important amino acids that help build muscle, chicken hearts are especially rich in iron and zinc. Chicken gizzards are relatively low in fat, making them a suitable protein option for dogs, especially those on a low-fat diet. Most nutritious part of chicken. Farm Fresh , 100%Natural, Immunity booster ,Gluten-free Rich in amino acids and contain high-quality protein. Great source of zinc, copper (which helps prevent anemia), iron, and vitamin B-complex.