My dog, Peanut, and I play with these balls every evening and she plays with them alone throughout the day. I have a small pail with a dozen balls in various states of use always available for her. Even when she's pulled the coating and squeaker off, she likes the ball because it bounces higher than it does when its new. The first command she learned was fetch; now she likes to catch a bouncing ball. We have a couple other brands around, but Peanut has no interest in those probably because they aren't as pliable. At 20 pounds, my dog thinks these balls are the best fit for her.