Active Play, Everyday The FitPAWS® Dog Balance Disc will turn any flat surface into an active one. Beginner Balance Training General Fitness Rehabilitation Changing the level of air in the cushion will encourage your dog to engage different muscles to maintain balance. The micro-movements created in the body from the act of balancing will strengthen the core and limbs. Balance Disc comes in 2 sizes 14” (35.5 cm) and 22” (55.8 cm).