Natural Pet Collagen Bones are irresistibly delicious and beneficial for dogs. These all-natural, protein-packed dog chews aid in improving muscle and joint health. The bones help improve digestion, and promote a healthy skin and coat for a happy, healthy dog. Moreover, these tasty chews have no chemical additives, hormones, coloring, or preservatives. The all-natural peanut butter flavor is sure to be a new favorite.