Chew Meter: Super Tough. Bones are one of the longest lasting natural chews out there, especially when compared to the price point. This bone is sourced from a weight bearing bone, so it will not splinter like a rib bone. Weight bearing bones are extremely dense and not recommended for dogs with underlying dental problems. INGREDIENTS Beef Bone: Beef bone, beef and bone meal, vegetable glycerin. Peanut Butter: Beef bone, beef and bone meal, vegetable glycerin, roasted peanut flour. Bacon & Cheese: Beef bone, pork meal, beef and bone meal, vegetable glycerin, dried cheese, curcumin, natural smoke flavor.