Beef heart, a muscular organ, is classified as a superb lean muscle meat and is an exceptional source of vitamins B6 and B12, iron, and taurine (an essential nutrient for cats). Ours is made from 100% USDA Inspected and Approved Human Grade beef. Available in chunks (approx. 24oz). Hearts should be fed in smaller amounts as muscle meat, and are not meant to be served as the only muscle meat or as a full meal. Suitable for both dogs and cats.