if your using the microwave for 1 second...then what's the point?? Aside from thinking about how gross that is if you use it for your own food as well, Adam is right about cooking the rodent from the inside.

If I have to do any thawing I use a hot water method similiar to what smulkin explained. I would not recommend thawing by leaving the rodent out for an extended period of days that is not healthy either.