Just a thought. One of my friends used a row of xmas rope lights (bought on sale in January) to keep under her pots in her greenhouse in the winter months. easy under'floor' heating for the plants which may also work in some way for a trough of chickenfeed?? Just gave off a gentle steady warmth....I have a trough feeder, so it wouldn't work for me but probably would for those who use different style feeders. I could just hang a warming light over the feeder but I don't want to keep that power going all the time. When the coop is winterized, I think the feed will be the same temp as their water and shouldn't be too cold....just waiting on my hay bales to be delivered next week.