My chickens just snuggle up to get warm. It went from 40 degrees to 10 degrees at night here this week and they are all fine. I'd be more concerned about burning my coop down then the chickens being cold for a few hours.
BTW, we only brood with ceramic heat lamps like you use in a terrarium. They don't seem to get as hot as brooder bulbs and they seem safer. They cost a little more and we use 2 in the brooder but I don't stress as much about a fire.
BTW, we only brood with ceramic heat lamps like you use in a terrarium. They don't seem to get as hot as brooder bulbs and they seem safer. They cost a little more and we use 2 in the brooder but I don't stress as much about a fire.