Is there a good reason why all 5 of my chickens would rather hang out in the run area (covered in plastic to keep out the snow, if you click below on the link to my page you'll see what I mean) And I mean hang out there at night, all day. Thankfully the girls go in and lay their eggs in the nest boxes, but other than that they are all outside. It was suppose to get really cold last night, so I tried to put them all to bed in the coop, but as fast as I put them in, they came back out. I have tried with the lights on (a 40 watt bulb) and with the lights off, doesn't make any difference. WHAT'S WRONG WITH THEM????