Trixie Nub Toy Balls

My kitten loves watching them bounce, but loses all interest once they're on the floor. So basically, it's not an independent toy at all—you absolutely have to play with her... which means going to fetch the ball when it bounces into some random spot because of the little spikes. Since she only plays with the balls when I'm supervising, I haven't had the problem other reviews mention about bits of plastic coming off.

The balls are really great as toys for cats. When you throw them on the floor, they sometimes bounce around unpredictably and make our cats dash all over the flat. However, we have the problem that our tomcat keeps chewing on the little nubs and would actually eat them—or has already eaten some. So now he only gets the ball when we're watching him. Please make sure to keep an eye on this!