1 Pound Beef Lung Puffs Munchies USA Dog Pet Treat Natural Chews 1 lb. of Beef Lung Munchies. This treat is a high protein treat and breaks up for training Slow roasted in it's own juices for up to 53 hours USA Beef Lung Made in USA USDA Approved, Lot 341121 Best By Dates 7.25.18