Barkworthies Femur Bones are as natural as they come. Femur Bones are center cut from the femur and full of nutritious marrow, providing your dog with a highly digestible source of calcium. Calcium intake is crucial for your dog’s body to maintain strong bones and teeth. This bone is also high in Iron and Zinc which helps your dog's body fight off infection, maintain a healthy immune system, provides energy to help support brain functions and gives them a zest for life! Barkworthies Femur Bone is a hearty, durable dog chew that will give your pet hours of chew time as well as cleaner teeth! These bones are FDA approved and sourced from Brazilian cattle. Brazil’s livestock and meat industry is well known for their high quality meats and low disease rate. Barkworthies Femur Bone is baked with pieces of meat and tendon giving them a natural flavor and making them a highly appealing dog chew! Barkworthies chooses to bake their Femur Bones to rid the product of any possible bacteria. Barkworthies Femur Bones are extra-long lasting for your medium to large dogs and a durable chew for your aggressive chewers. As with all of their products, Barkworthies are additive-free, chemical-free, and preservative-free dog chews. In fact, most Barkworthies products are single-ingredient chews, making them all natural, healthy and safe for your dog.