I'm in the hill country of Texas where Spring time means 85 degree days and 65 degree nights. My coop opens up into a totally enclosed and secure run. I have 8 pullets that are 8 weeks old. They instinctively head to the coop when the sun goes down and I close the little door and they are in for the night. Last night we had a friend come over and long story short, I went to bed and forgot to close the little door. I think it's called a 'pop' door?? Anyway, when I got up in the morning they had already come out and were enjoying the sunny morning. My question is, do I have to close the door? I mean there is nothing that can get to them so I know they are safe but just close it because I think that's what I'm supposed to do. Thoughts?