I am about to switch (today) from a traditional galvanized metal watering container for my flock of 7 backyard chickens to a hanging (vertical) nipple watering system. I believe that this new system will be superior in every way. Unfortunately I do not have electric power running out to my coop or run. Thus, with my previous galvanized metal waterer, when the weather turns cold I have to go out to the coop each day and refill my waterer with hot water. I would like to find a way to keep my new nipple waterer from freezing in the water without having to refill the waterer multiple times daily. Does anyone know of a battery powered (since I don’t have power running out to the coop) submersible water device that I can leave in the nipple waterer watering device in order to keep it from freezing? I can’t find one anywhere. Thank you!