ZippyPaws Chipmunk 'n Acorn Burrow Toy with 3 Chipmunks, Plus 3 Extra Chipmunk Refills ZippyPaws Chipmunk 'n Acorn with 3 Chipmunks, Plus 3 Extra Chipmunk Refills Interactive puzzle toy challenges your dog Keeps your dog entertained and occupied Great for small and medium-sized dogs Acorn size: 7 x 6.5 x 6.5 Inch