Barkworthies Knuckle Bone Fillets are a perfect beefy treat for medium and large breed dogs. They are baked with the meat and tendons still attached which will encourage chewing, giving your dog’s teeth a natural flossing and provide them with a nice dental workout. Barkworthies Knuckle Bones Fillets are also a great calcium rich dog chew and come from grass-fed, free-range cattle.