Shake for funky sound to perk up playtime! Funky noisemaker combined with unique patent-pending Treat Meter means added hours of fun. Treat Meater provides ideal random dispensing of kibble and other dry treats. The round openings have inner-facing soft rubber prongs. The prongs move aside to allow for easy stuffing of kibble into the toy. No need to use peanut butter or other sticky stuff to hold treats inside. As dog plays, kibble will randomly fall through the openings, rewarding your dog and encouraging further play for hours of fun. Chew strength is rated "Hard" by the manufacturer. The Chuckle measures 7 1/4" long, ideal for most dogs.