Featuring durable nylon and rubber construction, the Jack holds our Gnawhide Rings in multiple locations to customize the toys difficulty level. Enjoy this new twist on a classic toy! Turn meal or treat time into playtime with PetSafe Busy Buddy Dog Toys! Fun new ways to help bust boredom for even the toughest chewers or break separation anxiety for the anxious pups. Let your dog get his energy out with one of our toys, so you and your dog can live happy together.