Rinderskin filled with lung, 17 cm, 46 pieces refill box Our rawhide filled with lungs is delicious chewing fun for small to medium-sized dogs and large breed puppies. The tough skin of the cow contributes to dental care and ensures long-lasting activity. Crude protein in%: 82% fat content: 2% Crude ash: 6% Crude fiber: 0% Type of feed: Complementary food for dogs.