I don't want to keep him as a pet, just long enough for my daughter to observe him (her? Haven't looked that close yet) for a couple days. I'd like mouse to be comfortable in the mean time. It was fleeing a rained out field and may have been played with by a cat, and was crossing the road. It looks a bit spiky in the fur and has a crooked tail, but no visible injuries, so I'm not going to handle it more than I have to. We have a temporary rat cage, the plastic type that we usually use for stick bugs and potato bugs and things of the sort, a chicken towel in the bottom, water, and now.. Food?