PetSafe Busy Buddy Ultra-Thick Natural Rawhide Dog Treat Refill Rings, Replacement Treats for PetSafe Busy Buddy Ultra Treat Ring Holding Toys ULTRA THICK RINGS: The PetSafe Busy Buddy Ultra-Thick Natural Rawhide Dog Treats are 4 times thicker than standard Busy Buddy Treat Ring Refills; each package comes with 6 Size F Treat Rings LONGER-LASTING PLAY: The Busy Buddy Ultra-Thick Natural Rawhide Dog Treats are a great options for dogs who chew through the standard rings too fast WORKS WITH BUSY BUDDY ULTRA TOYS: These treat refill rings only fit Busy Buddy Ultra Treat Ring holding toys including the Ultra Statros, Ultra Woofer and Ultra Sub SAFE AND SATISFYING: Made from compressed natural rawhide, the PetSafe Busy Buddy Ultra-Thick Natural Rawhide Dog Treats are tested for quality, safety and health POSITIVE PLAYTIME: The treat refill rings help redirect destructive chewing behavior to the Busy Buddy toy instead of furniture or footwear SUPPORT FOR YOU: Call, chat or email with our expert US-based customer care specialists six days a week at 1-800-845-3274 or ccc3@petsafe.net; they are waiting to assist you and your pet EXPERIENCE: PetSafe brand has been an industry leading US manufacturer of pet behavior, containment and lifestyle products since 1991, helping millions of people and pets each year