@MontereyJack,
An old best pal of my ex and I once lived in a FLW house in Wisconsin. I once knew which one, but now forget. Anyway, there was a 'pond' going into the house. (I've since had a client with another house like that, another story, another time.) Anyway, for Harvey, this great feature meant all sorts of animals came into the house at night. Do I remember muskrats being among them?