The ball on the string reward toy is ultimate reward toy for most dogs. These balls are easily thrown far more accurately and much further than a standard tennis ball while also being far less dangerous for your dog. These balls are a fantastic fetch toy and tug toy combination that is easy to clean and fits nicely in your pocket! The loop string creates an easy to grip handle for playing tug with your dog and makes the ball easy to throw long distances. The euro size ball is ideal for most dogs, but smaller and larger sizes are available upon request. These balls are ideal for dogs that are experienced tug/fetch players that know how to target and have a well developed grip. Most dogs should be started on a tug before graduating to a ball reward toy. These balls do not float in water