Collagen SticksOur collagen dog treats are made of 100% pure collagen, making them a highly nutritious treat for your dog. Collagen chews help to supplement the natural collagen your dog needs to maintain healthy bones, muscles, joints and skin, particularly as your dog grow older and finds it more difficult to absorb collagen naturally through other proteins in their diet. Our collagen dog treats are an entirely naturally occurring protein derived from cattle, and