I have an automatic chicken door that closes when it gets REALLY dark. Nevertheless some of my 8+ week old chickens decide to stay out frequently. Is that a teenager thing or do I need to trick them somehow into getting inside? They seem fairly reluctant when I find them outside and try to send them in. Happens maybe twice a week. Not always the same birds or number of birds. They have food and water available 24/7 inside the coop. I do not feed or give water outside. They are probably just having too much fun outside... Any suggestions?