I live a couple hours northeast of Winnipeg, Manitoba, Canada and yes it does get quite cold here in the winter. I just finished my coop build and it is insulated and can be heated if need be. I made sure to put in some ventilation to remove humidity from the coop and I'm pleased with how it has been working. Temperatures for the past week or so have been hovering around 0C or 32F and cooler at night. The chicks have still been wanting to go outside and scratch around. There has been no heat in the coop and the birds are fine, except that their egg production has fallen off the last few days. Without rehashing all the heated coop debates, how does one maintain egg production during colder temps?