Hey! This is my first year keeping chickens. I have 4 chickens, 3 golden comet hens and one araucana roo, I’m in Canada and where I am gets down to -20 -40 Celsius in the winter. I’m finding mixed information about if I should heat their coop or not. They share a coop with 5 ducks as well.I don’t want to do anything that will cause frostbite and I can’t find any information that helps. Any advise is appreciated