16 irresistible, refillable natural rawhide treat rings in original rawhide, sweet potato, and 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 dog's Busy Buddy toy.