This summer I built my first chicken coop/run. The chickens are thriving now but I'm wondering about this winter. The coop is a 4x8 with a 6 foot slant roof. It has a 20x20 vinyl window on one end and the ramp on the other end. The entire front opens up for access. It has a raised wire mesh floor with 1/2" holes in it. I put a rubber skirting around the base to prevent a draft and the rest of the coop is sealed up tight. This works great in the summer but in the winter time if I closeit up they might smother in their fumes. I usually spray out their coop every week with a water hose to get the droppings out. I won't be able to do that in freezing temps. Will the chickens be ok spending time outside in freezing temps, and snow?? I also want them to keep laying all winter. They will need 16 hours of daylight to do that. And my coop is set up with a white heat lamp. But I don't think I can run it 24/7 without messing up their schedules can I?? I also have infer red heat bulbs, will those count as part of the 16 hours of light? After the lights go out can they survive a night at near zero temps without the heat?? Will they come out dieting the day when there is snow on the ground. We get lots of snow and windy freezing temps. Any ideas will help.