My flock is 15weeks (6 female Khaki Cambells) and they're used to always having a 175w red heat lamp on all night. They have plenty of ventilation so they don't get too warm and I keep it on at night for some warmth and so they can see their food and water and I've heard that it keeps them from picking on each other. If I turn it off (don't need it for heat tonight) will they freak out (not see their food, pick on each other), because it's dark and they haven't been in the dark all night before? I know they shouldn't get too much light because they might start to lay prematurely, right? I'm going to order the ceramic non-light heat bulb for when the cold comes back soon. I try not to keep it too warm, either, so they won't pick on each other. They have enough room, though. Any thoughts? Thanks.