Contains: Beef Kidney Over a pound of pre dried beef kidney per 4oz bag! Great for breaking into smaller pieces and using as a healthy training treat or meal topper! Beef Kidney is rich in B-vitamins, folate and minerals including iron, magnesium, selenium, and zinc. Kidneys are a heart healthy, excellent source of protein, containing omega 3 fatty acids known to provide anti-inflammatory properties. For pets new to organs, please introduce slowly and gradually as giving too much may be overly rich for your animal and cause soft stools. Be warned, these have a VERY POTENT SMELL!!! Those sensitive to smell may want to steer clear of these.