Stuff-A-Ball Large Kong Stuff A Balls have patented dental ridges effectively clean teeth and massage gums. For extra cleaning, dog toothpaste or Kong Stuff'n Paste can be used inside the grooves. Available in small, medium, large and x-large. Product Description The Kong Stuff-A-Ball is a treat dispenser that will keep your dog physically and mentally stimulated. The hollow inside holds treats or biscuits, while the outside holds paste-style treats and toothpaste. As your dog tries to get at the treats and paste, the Dental-Ridges clean his teeth and massage his gums. The Kong Stuff-a-Ball dog toy can reduce boredom, separation anxiety and other destructive behaviors. The small-sized Stuff-A-Ball is recommended for medium dogs, such as Chihuahuas, Pomeranians, Yorkies and other similar sized dogs. Features: Ideal for small dog breeds Dispenses treats and pastes Recommended for use with Kong Stuff’N Pastes and Snaps Cleans teeth and massages gums Durable and bouncy rubber