Nylabone DuraChew Bones in Bacon flavor are the perfect solution for powerful chewers. Their bristles help to clean the teeth and reduce plaque and tartar buildup. These durable nylon bones are designed to provide chewing satisfaction and dental stimulation. Different breeds may have different chewing styles, with some being stronger chewers and some being more gentle. Though the bones are not meant to be consumed, small shavings no larger than a grain of rice may pass through. They should be replaced when the knuckles start to wear down.