GURU Duo Ball Dog Toy. Roll, spin, solve and play, the GURU Duo-Ball keeps dogs challenged and engaged through intentional multi-functional play by addressing instinctive behaviors. Treats slowly make their way from the inner ball to the outer ball before finally reaching – and rewarding – the dog, all while tumbling about the floor for engaging, fun-filled play sessions. Made with Chew Pro™, GURU’s ultra-durable, custom, non-toxic thermoplastic rubber formulated specifically for tough chew sessions. Roll, spin, tumble and solve Occupies and extends treat time For independent, challenging play Easy loading and cleaning Made with Chew Pro™ Product Dimensions: 7.25”L x 3.5”W x 3.5”H Recommended for dogs up to 60lbs