Mighty Mutz Balls are heavy-duty rubber Toys that are non-chewable for dogs. They are perfect for any dog that chews aggressively and can destroy other Toys in minutes, and they come with a 3-year non-chewable guarantee. They feature a hollow center, making them ideal for stuffing with treats or pastes. They also float, making them great for playing fetch. Suitable for dogs weighing from 13.5 to 27 kg.