Anyone have advice about how to keep water from freezing in the winter? My brother raises chickens and he mentioned having a heating pan or coils to put in a metal bucket. I would like to avoid running the extension cord out to the coop, does anyone know of anything that would help? Is there a battery operated device to put in the water bucket? or any other idea (wrapping insulation, breaking up the ice daily, etc...) I know it is still summer but I am readying the coop now while I have the time.