The Chuckle is a funky noise-maker thats sure to perk up playtime! Either end of the Chuckle has inner-facing, soft, adjustable rubber prongs that move aside to allow the toy to be stuffed with kibble or treats. The prongs of the Treat MeterG allow food and treats to randomly dispense, rewarding your dog as he plays. Made of natural rubber. Recommended for strong chewers. Available in 1 size only.