[imstillagto65]

I had a similar situation several years ago. We narrowed the odor down to a closet in a spare bedroom that was full of my wifes shoes, shoe boxes etc. We emptied the whole closet and found nothing, but the smell was obviously coming from that closet . Finally, on a hunch, I went up in the attic and directly above that closet I found a dead racoon that had found his way in under a piece of loose soffit. Had to not only remove him, but about four trash bags of blown in insulation---not a fun project. I thought something that big would smell a lot worse than a dead mouse, but I guess the fact that it was separared by the ceiling and the insulation made the odor exactly the same.

Hope this isn't what's going on in your house, but if that smell doesn't go away in a couple days, you better start looking.