We can get down that low, too, here in Central Oregon...brrrr!!! Chickens, especially big breeds like yours and mine, will do well down to -20. I do not heat my coop. Chickens don't need heat, what they need is ventilation. Moisture/humidity is what will produce problems especially frostbite. If you have condensation on your windows/walls of your coop you're keeping them too "tight" and you need to open your window(s) a crack to prevent that from happening. Chickens are not like humans, they do not need heat. While the snow is is blowing and it's freezing outside our first instinct as humans is to think "oh, I have to put some heat out there, they're freezing" .... NOT! I put some Vaseline on their combs and wattles to help prevent frostbite.Thanks so much for the information. This is my first time with chickens and I appreciate the advise. How do you heat your coop in the winter? We can get -20 here in Idaho.
Some people still insist on heating their coop, and the results can be devastating...
Twelve chicks and 8 hens were lost in this fire...so senseless. So to heat or not to heat, that's up to you, but I don't advise it.
To keep your girls more comfortable you might wrap their run area with plastic sheeting, this is what I have done:
I've wrapped three sides, leaving a small area open on the north side of my run and about 6-8 inches up at the top all the way around for good air circulation. This will keep the freezing winds off of them...just an idea for you.