Not for households with cats.
Yes, it's a working mouse made from a dead mouse (rat, really) carcass. The ananova story, which also features a computer made with a stuffed beaver, identified the geniuses behind this only as "two U.S. inventors."
previous ananova finds:
1. Stalin as repo man.
2. The most brilliant-est tourism marketing move ever.
3. World's worst sound ID'd.
4. 2006 Darwin Award winners.
5. Colonel Gaddafi wants his Coke® money.