A mouse moved in a few months back, then a second one and now there is a family of 6 including the parents. They're no trouble and according to what I've read they'll move back outside in Spring. They are very clean and a delight to watch. I put hamster/gerbil food down for them and fat balls and water to wash the fat balls down. lol They are getting more and more used to me watching them. I'm not sure whether I want them to be tame enough for me to stroke them or whether that would put them at a disadvantage when they return to the wild. For now, in this extremely severe Winter, it feels good to be doing something to help some wild creatures who might otherwise die