The Aussie Dog Tucker Ball is the tough yellow ball that keeps on giving. You can place dry treats inside to provide hours of self entertainment for your best friend. It randomly dispenses food as the ball rotates. Even when empty, the rattle will continue to provide stimulation. The correct size will be based on your dogs weight and jaw size (As a safety precaution do not buy a ball that can completely fit inside a dogs mouth.). The 80mm Aussie Dog MINI Tucker Ball is designed for 1 – 5kg dogs.