Our Beef Moon Bones are 100% air dried beef cartilage. A long lasting chew, it is softer and more flexible than bone and unlike bone, cartilage won't splinter. Great for tough chewers and sensitive stomach, it is a natural source of Glucosamine and Chondroitin. It is low in fat, high in protein and has an intense aroma, sure to be attractive to all dogs and get their tails wagging.