It only took one fire in my coop due to a heat lamp to turn me off of those fire starters!!!! beacuse i leave my coop open 24/7 i do have a heat lamp well away from my coop that the flock can sit under if they feel like it, (well away and with it's guard on it) i do have a 75 watt bult (reg house light) in my coop but chickens can keep thems selfs warm through body heat, we also give a scoop of corn at night feeding for the extrea wormth.