It's been well below zero this week, last night it hit -30. It doesn't usually get THAT cold here, so I found myself unprepared. Last night I brought out milk jugs of hot water and hoped for the best. But it has me thinking of what heat options I can use in extreme temps. I know I don't need one all the time, but I have all bantams, mostly Silkies, and I've been told they're not very hardy. I don't like the idea of a heat lamp for several reasons 1. Fire hazard. It's a small coop and the highest point would only be about 3 feet above the wood shavings. I've just heard too many coop fire horror stories to risk it. 2. The Light: I've read that the light at night messes them up, messes with their sleep and laying, etc. 3. I don't want them getting used to a strong heat lamp and then go into shock when I take it away. So I'm trying to think of heat alternatives for those times when it gets well below zero. Has anyone tried those "heat rocks" that are used for Iguana's?? Low heat, they could cuddle on it, etc. Out of my 8 chickens, five are Silkies, so they sleep on the coop floor, where as the three feathered breeds perch, so the heat rock wouldn't help them. Any other alternatives that people have tried or can think of?