Let your dog brush his own teeth while he's having a blast playing with the PetSafe Busy Buddy Bristle Bone. It has 3 chewing surfaces and a treat ring for your dog to chew on. The rubber nubs and nylon bristles to help stimulate gums and keep teeth clean. This toy also includes 4 Busy Buddy treat ring refills (additional treat ring refills available separately). Designed for tough chewers, this fun toy is made from durable nylon and heavy-duty rubber. It's safe your pet, easy to clean and top-shelf dishwasher safe. Choose from extra small, small, medium and large sizes. For dogs over 6 months old. PetSafe brand is here to help you and your pet live happy together.