One Fast Cat Exercise Wheel 5Th Generation Cat Toy - Cheetah A bored cat is an unhappy cat, and without a stimulating environment, cats, especially indoor cats, get bored quickly. That's why we created our One Fast Cat exercise wheel. The wheel gives cats a safe outlet for energy that would otherwise manifest in destructive or unwanted behaviours, like clawing at the furniture, racing through the halls, or harassing their humans. Being entirely cat-driven, the wheel needs no batteries or power source, and it can be used by the cat without any assistance. Once your cat learns how to use their new toy, they'll hop on it throughout the day, usually going for a quick sprint or two every few hours.