The Funkitty Egg-Cersizer is a treat/feeding ball that's designed to randomly dispense treats & kibble. The Egg-Cersizer is uniquely adjustable to your cat's level of play. Open 1, 2, or 3 holes to customize to your cat's needs. Unlike other feeder balls on the market, the Egg-Cersizer can be adjusted on the outside of the toy. Also features the Treat Meter™ which allows for treat distribution from all angles.