Snoopy already had a ball that dispenses treats and Mickey would follow him and eat most of the treats, so I decided to get Mickey a tougher ball that would dispense treats so Snoopy would get some treats too. I filled both balls and Snoopy enjoys his without Mickey's help. Mickey didn't understand how to get the treats out and they come out really easy. It will probably take a few times until he understands he needs to roll and ball and not depend on me or Snoopy to get the treats out of the ball. Once the treats are gone, he loses interest in the ball completely. He doesn't chew on it.