PetSafe Busy Buddy Bristle Bone Dog Toys, Large (2 Pack) Pack of 2 PetSafe Busy Buddy Bristle Bone Dog Toys Durable treat holding chew toy for dogs Nylon bone, bristles, and rubber sprockets firmly grip Busy Buddy treat rings to keep dogs motivated to play longer Helps redirect potentially destructive chewing behavior into positive playtime Hard chew strength, uses Size C treat ring refills