The dog Interactive Elasticity Ball is made of extra-tough rubber, good elasticity, bite-resistant and nontoxic, non-abrasive, safe for your sweet dog grinding and cleaning their teeth. It's perfect for fetch and interaction with your dog. You can add food or treats into the grooves and this can keep them busy for hours. The unique teeth and bar design on the IQ ball help to clean the teeth and prevent the formation of tartar and plaque while massaging their gums when chewing. A fun Toy Ball to keep your dog mentally and physically stimulated, it can also be used as a fetch ball.