From this thread: http://chazhound.com/forums/showthread.php?t=156188 Finally saw it and it's definitely a tiny mouse. I discovered it because Mia vanished from where I was and that's so strange. I found her in the spare room digging frantically between the shelves and the wall. I figured it was 'the shadow thing' and it was. She went around to the other side of the shelves and flushed it right towards me. I jumped and screamed. Mia is pitching a fit right now because I blocked her from the room where it is. What do I do now? I really really am grossed out. ETA: I haven't seen Mia this excited in a while. That mouse made her day lol.