PetSafe Busy Buddy Natural Rawhide Size C Replacement RingsDesigned to keep your pet busy with activity! Our PetSafe Busy Buddy Natural Rawhide Size C Replacement Rings are irresistible to dogs! These replaceable natural rawhide treat rings are designed for use with select Busy Buddy toys. Make sure to confirm correct toy and size! These rings fit the Bouncy Bone (Med/Large and Large), Bristle Bone (Large), Jack (Large), as well as the Nobbly Nubbly (Medium) all sold separately. Treat refills reward good chewing behavior to extend playtime and help to redirect potentially destructive behavior into positive playtime and will keep your dog busy for hours as he or she tries to get these delicious treats on the toy. Treat toys offer a great way to entertain your dog while mentally stimulating him or her to work for his treats.