How cold is too cold to let your chicken's out of the coop? I live in MT and we are starting to get days where the high is only 15 degrees Farenhiet. I'm assuming there comes a point temp wise when they shouldn't go out. It's going to get where the highs are only zero or below. I have a small, insulated coop for my 10 hens. I believe they have adequate space in the coop to be confined during cold weather (4-5 sq ft per bird). Also, any small heated waterers that you use in the coop when temps get too cold? I don't like to keep water in the coop so as to keep it as dry as possible but I am anticipating days where it's going to be frigid and I need them to have access to water in the coop. It needs to take up as little space as possible. Thanks for your advice.