I sometimes to it for a little bit during the day, when I am home, and not when it's dark, because we do have opossums and raccoons around here. I have a feral, she is asleepin my garage right now, she sleeps there when it's cold. I live in Orlando, crime is horrible here. I don't think I'd ever leave my garage cracked open for long and never when I'm not there. THen again, I have lived places where you can leave it open all day and no one bothers anything. I guess it depends on where you are.