Bristle Bone™, the dental toy dogs are GUARANTEED to chew! Durable nylon bristles and rubber nubs clean teeth as dog chews. Irresistible gnawhide treats extend the chewing experience. Also, put a squirt of doggy toothpaste down in the bristles and let your pup brush their own teeth. Available in X-small for teacup and toy breeds, Medium for small to medium sized dogs and Large for the big guys! Recommended for dogs 6 months or older.