I haven't thought about the day our mice arrived from Uncle Gary in a long time.. Soon as the package was brought into the houe, they were all RIGHT THERE! They can small those things a mile away and I don't care how hard they are sleeping, it gets to them and they come running! Theirs is years old and I honestly think, Giz keeps it hidden because it will suddenly appear out of nowhere and they will fight over it.. They keep their "punch" forever!!!