Redbarn’s Collagen Chews are packed with protein! Collagen is a protein found below the top layer of skin in both animals and humans. It is one of the key components of connective tissues. Think of it as the glue that helps hold the body together. Collagen has higher protein and less fat than traditional rawhide treats and digests much easier. Small size, approx. 5.5-6 in. 5 pack.