Like other meats, duck is an excellent source of high-quality protein containing a well-balanced array of amino acids. Duck also contains generous amounts of iron, phosphorus, zinc, copper, selenium, and lesser amounts of the minerals potassium, magnesium, vitamin E, A, C, and folic acid. Duck is rich in fatty acids. It is an excellent food for performance or highly active dogs or as a novel protein source for allergic pets. For pets that require a lower-fat diet, duck can still be fed, although less often or in smaller portions per meal is recommended.