I'm looking for some advice on how to set up our coop for the winter. We live in central new york. We are known for bitterly cold temperatures, and record snow falls from the great lakes. Our coop is 32 square feet, has 4 nesting boxes, and is on stilts about 4 feet off of the ground. They have a ramp that goes down to a run that includes underneath the coop. We have 3 hens, and one rooster. Are we supposed to actually heat the coop over the winter? I've read that they create their own heat, and it's not necessary? I'm just worried that the coop is too big for that few chickens to work properly. What would you do? Thanks so much in advance!