This is a great thing to use to play ball with your dog and I highly recommend it.  I gave it only 4 stars because I have a toy poodle who is an avid ball retreiver but her mouth is so small that she drops the regular chuckit ball several times before she gets back with it.  It's painful to watch her struggle but she is so determined.  This is her most favorite thing to do.  I have stopped using the chuckit but wish they had a small one for the XS Kong tennis ball, which is her favorite and fits her mouth perfect.  I also have a miniature poodle, whose not into retrieving a ball, but the ball for the regular chuckit is the perfect size for him.  It's a great product for anything over a small toy dog and has many benefits to playing ball with a larger dog.  So hey chuckit, how about making a small one for those little toy dogs.