The Starmark Treat Ringer Dog Toy is an extremely durable interactive toy that will keep your pup mentally and physically engaged. Both the Ringer Horseshoe and Ringer Orb hold Starmark Edible Rings that fit onto the inner loop of the toy. They can also fit sideways between the outer wall and inner loop. It???s a fun way for active chewers to satisfy their natural urges as they bite the treats and try to remove them one by one. The Starmark Treat Ringer encourages non-destructive chewing, which alleviates boredom and is also great for your dog???s dental hygiene.