It is cold and snowy here in Seattle. About a week ago we put in a small infared heat bulb in the coop to keep the temperature from freezing inside. Tonight well after dark we found 5 of the 6 hens on their outside roost. This is the first time we have found them outside after dark.... we hand carried them into the coop. Are they confused by the weather? The infared light in the coop? Thoughts?