6 irresistible, refillable natural rawhide treat rings in original rawhide or peanut butter flavors. Busy Buddy treat rings are designed for use with select Busy Buddy toys, including the Bouncy Bone™, Bristle Bone®, Nobbly Nubbly™, and Jack. Make playtime last longer by adding these treat refill rings to your dogs Busy Buddy toy. Or Try.... Ultra-Thick Natural Rawhide Rings: Give your dog more chew time and play time! The Sportsmen ultra-thick rawhide treat ring refills are specially designed for Sportsmen Ultra toys. 4 times thicker than the regular Sportsmen rings, they last longer and are ideal for tough chewers.