The Pit Ball unit was designed as a tool to help vent major muscle energy. So many behavior issues arise due to excess amounts of energy and having no way to vent that energy. The Pit Ball is an awesome TOY that gets the Job done.
The Pit is a 5' Diameter circle that comes with a 6" indestructible type hard plastic Ball that your dog cannot pick up, but he can work the ball around the circle and get a great workout.
Works great with large or small dogs, inside or outside!