GURU Ball Dog Toy. The ultra-durable GURU Ball is perfect for longer play sessions as well as ideal for interactive games of fetch and retrieval. Add kibble or small treats to the inner ball for treat dispensing to elevate play and appeal to all the senses. As dogs roll, spin, and bounce the ball, the kibble moves from the inside ball to the outside ball where it is dispensed, rewarding the dog. Bounce, throw, solve and play The ultimate puzzle ball Fun, interactive and engaging Occupies and extends treat time For independent, challenging play Easy loading and cleaning Product Dimensions: 3.5”L x 3.5”W x 3.5”H