All-Natural, Collagen Stick Chews! Collagen sticks are all the rage! They are a nutritional powerhouse, made from the inner, softer, layer of a bull’s skin called “corium”. They are 100% digestible, easier to chew, and don’t present a choking hazard. This is NOT rawhide. Collagen helps with joints, skin, fur and nails. Our sticks are 100% natural collagen which maintains healthy joints and skin elasticity. We hand select the best Collagen Sticks from free range cattle, cure them just right to maintain flavor and deliver them while fresh.