4 oz. Beef Lung Puffs Munchies USA Dog Pet Treat Natural Chews 4 oz. of Beef Lung Munchies. 1 of the 4 oz. bags. This treat is a high protein treat and easily breaks up for training Its light and tasty, made of the best USA beef lungs Slow roasted in it's own juices for up to 52 hours. Made in USA, USDA Approved