I would make sure before you go sniffing mouse pee that no mice have been it it recently. Hantavirus is carried by deer mouse excrement & urine.It can kill you. I don't know how long it can live outside the mouse, I have heard several days. Might want to use the germicide before sniffing.

1957 Chevrolet 1/2-ton Stepside LB in the Gallery
My Photobucket shots

The person who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself." - John Stuart Mill (1806 - 1873)