Yeah, letting them go is the best idea. I've saved a ton of wild mice from work and I usually end up letting them all go in my backyard. I usually find a few mice and lizards in the house. It doesn't really bother me, lol. I think we have a family of mice living in a closet right now. My husband isn't crazy about them but he'll get over it. They were probably living in the house before we were.