These Knuckle Bones are one of Barkworthies' largest bones, the size of a softball, making them a perfect beefy treat for medium and large breed dogs! Extra-long lasting and durable, these dog chews are great for aggressive chewers. Barkworthies Knuckle Bones are baked with the meat and tendons still attached which will encourage chewing, giving your dog’s teeth a natural flossing and providing them with a nice dental workout.