Toppl Puzzle ToyBUILT FOR MODERATE CHEWERS This customizable puzzle and treat toy is designed to be filled with a dog's favorite kibble or treats. Toppl's soft, rounded inner 'teeth' contain a contoured cavity to hold treats in place until your dog nudges them out. To change up the challenge, simply connect the small and large together to make make Toppl even tougher. Treat dispensing puzzle toy helps stimulate dogs brains to support healthy growth Large and Small