The Aussie Dog Tucker Ball is the tough yellow ball that keeps on giving. Place dry treats inside to provide hours of self entertainment for your best friend. As the ball rotates, it will randomly dispense the dry food. 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 precaution do not buy a ball that can completely fit inside a dogs mouth). The Aussie Dog 150mm MEDIUM Tucker Ball is designed for 10 – 30kg dogs. Aussie Dog back it with a 6 month warranty