PetSafe Busy Buddy Bristle Bone Dog Toy DURABLE: Tough nylon and natural rubber to stand up to aggressive chewers; Hard chew strength PROMOTES DENTAL HEALTH: Bristles clean teeth while textured rubber massages gums REDIRECTS CHEWING INSTINCT: Helps redirect potentially destructive chewing behavior into positive playtime STIMULATION: Smooth nylon bone, soft bristles and textured rubber sprockets hold natural rawhide rings to entice your dog's senses and extend playtime TASTY TREATS: Toy comes with 4 natural rawhide PetSafe Busy Buddy treat rings; refills sold separately. Uses size B treat ring refills. SIZE INFORMATION: For dogs 25 to 50 lb. and over 6 months DISHWASHER SAFE: Top rack only HERE TO HELP: Call, email or chat with our expert U.S.-based customer care specialists Monday through Saturday at 1-800-845-3274 or ccc3@petsafe.net; they are ready to assist you and your pet