I'm still new to this. I have just two chickens and hear everyone talk abut how their girls go in the coop themselves around 4:30 or so every night. Well, I leave the their door to the run open most of the time unless it's really cold. Well they come out just about anytime any one walks outside or near the coop. They don't even leave the run till 8pm sometimes. I don't know if it's due to the fact that I keep the red heat lamp on? They don't seem any worse for wear, but I don't want to cause a problem down the road later. They are both 19 weeks and laying consistently too.