...then get a "Chuck-It". I bought one this weekend and my girls had HOURS of fun. They were worn slap out chasing the ball hundreds of yards at a time. So FUN! I got the smaller one so that the ball easily fits in their mouths.
Oscar loves to play fetch - Ruby however hasn't quite got the idea of the game and prefers to pinch the ball from Oscar and just run with it - He will eventually take the ball from her and fetch it back to me. All good fun and wears them both out!
We're thinking about getting the random bounce one. Starla had this little rubber cow when we first got her and she loved chasing that because it would bounce all over the place before she could catch it. Unfortunately, the cow had to be laid to rest as Starla ripped it's head off. So this may be just what we have been looking for.