Duck hearts are a rich in iron and provides dogs with a lean, easy to digest protein source. It is also a great source of amino acids, which helps to support strong muscles. Duck hearts are a muscle meat packed full of vitamins and minerals such as Taurine which is an essential part of a dog's diet. Duck is also a great option for pets with allergies to chicken or sensitive stomachs. Novel proteins like duck may help alleviate gastrointestinal upsets or skin irritation. It should be given in moderation as part of a balanced diet.