The fun Waggle toy lets your dog shake and wag the toy to his heart's content. The patented Treat Meter prongs randomly dispense treats as your dog shakes and wags the toy. Trim the adjustable rubber prongs to increase the treats' rate of release. The super flexible middle makes this toy fun for all dogs. Watch your pup play for hours and hours of fun! The Waggle is perfect for hard chewers and is dishwasher safe (top rack only).