Provides dogs with an unstable surface on which to perform exercises that engage a variety of muscles. By adding this conditioning tool to your dog's exercise or rehab workouts it requires them to find and maintain their center of gravity on a constantly shifting platform. When used for stretching, balance, rehabilitation and strength training, the Balance Disc teaches dogs to coordinate muscles for unstable conditions that they experience in everyday life. This versatile Balance Disc offers challenge and variety for all dogs at any fitness level. Use two together to make it even more interesting! Product usage guidelines can be found here.