PetSafe Busy Buddy Jack Dog Toy,  Chew Toy with Treats DURABLE: Tough nylon and natural rubber to stand up to aggressive chewing; Hard chew strength REDIRECTS CHEWING INSTINCT: Helps redirect potentially destructive chewing behavior into positive playtime PROMOTES DENTAL HEALTH: Textured rubber sprockets clean teeth and massage gums STIMULATION: Smooth nylon knobs and textured rubber sprockets hold natural rawhide rings to entice your dog's senses and extend playtime TASTY TREATS: Toy comes with 4 free natural rawhide PetSafe Busy Buddy treat rings; Refillable: Uses size B treat ring refills, sold separately SIZE INFORMATION: For dogs 20 to 50 lb. and over 6 months DISHWASHER SAFE: Top rack only Durable treat holding chew toy for dogs Nylon knobs and rubber sprockets firmly grip Busy Buddy treat rings to keep dogs motivated to play longer For dogs 20 to 50 lbs. and over 6 months Helps redirect potentially destructive chewing behavior into positive playtime Hard chew strength, uses Size B treat ring refills