Regardless of what it looks like, if there's no meat and no bones, it's not a mouse. Period. That doesn't just bake away.
Dude should hock it on eBay. Surely someone will see Jesus in it.
Just put a hot dog in it and eat it. You don't honestly believe hot dogs are mouse free do you?
Wow, that is crazy looking...I can't really blame the guy for asking for a second opinion.