I would NEVER let mine out! I suffered too many heartaches as a child because my grandfather wouldn't let them come inside, and they ended up dead. I always said that when I grew up they would be inside only. I get so upset when I see one on the road that has been hit. It especially bothers me if they have a collar on, because I know they belonged to someone. I wouldn't be able to sleep at night if I didn't know where my baby was.