My four girls have been outside for two months now and I still go our every night and lock the coop door. It is getting pretty warm here at night and my hubby thinks I should leave it open for a breeze. I just don't know. Our run it pretty secure with welded wire, sides and bottom, with an apron two feet out and around. The door is tight, nothing is squeezing in. I know we have coons, but nothing appears to have ever attempted an entrance. I think they get plenty out of our trash cans and the neigbors. What do you think? Do you think if they were getting in they would have already? There is plenty of chicken feed spill on the ground to attract. I have only see a few squirrels and a tiny bunny in there. It is hard to see, but a welded wire apron is also against the back fence in addition to the wood planking you can see. I am still nervous. LOL!