A chicken heart is a muscle located in the chest cavity of a chicken. The heart pumps blood throughout the body and supplies oxygen to the muscles. Chicken hearts are high in iron and protein and are a good source of niacin, thiamin, phosphorus, and selenium. While chicken hearts can be eaten raw, they are typically cooked before eating. Raw chicken hearts should be firm, pale pink in color, and free of any blemishes or bruising. If you choose to eat raw chicken hearts, it is important to wash them thoroughly with soap and water before consuming.