If anyone has dealt with this please let me know what you did. I have 21 ameraucanas that are 16 weeks old. They have an 8x4 coop with three 4' roosts and one 2 1/2 roost. There are 2 250 watt heat lamps that can keep the temp in the high 20's low 30's when the wind chill is below 0. However, every evening my husband and I have to go out and physically place 8-12 of them into the coop as they are preferring to roost outside in their run, up on the horizontal roof supports. There is only netting along the side of the run under the tin roof. I have witnessed them sit there when it was blowing cold snow right onto them. They are all fluffed up and last night at ten degrees, when I picked them up they are warm. There are a couple of them that will run back out of the coop just as soon as I set them down. Some nights there is fighting over the roost space and other nights not much. When they were younger, they'd happily go in on their own. Not the case anymore. They do have access to food and water in the coop. So my questions would be....if they want to stay outside in very cold weather, will it hurt to let them. Predators aren't really an issue.