This is my first winter with chickens. I live in the mountains of central WV and temps so far have been in the teens at night. I have a garden coop design with an open hardware cloth covered roof over their nesting roost in the coop. It is predator proof and certainly well ventilated, but when nights are cold like tonight with temps around 10 degrees, I worry that the chickens are too cold. So far they have been fine. I am considering getting a flat panel radiant heater to install on the wall of their coop. It is about 150 watts and considered safer than a heat lamp. Some people suggest using a plain 40- 100watt bulb to give extra heat, but I don't want the extra light in the winter. I don't care if egg production drops. I would like input about the wisdom of installing a flat panel heater. I can find very little about it on the forum. What are your thoughts? Thanks!