Yes, winter's coming alright...I, too, can feel it in the air. While we don't get as brutally cold as you do (normally get 2-3 weeks of -20 at night), it is hard to do no matter how cold it gets. I'm hoping the 250 watt bucket heaters I just ordered will be sufficient for my horizontal water nipple buckets...we'll see! I hate the thought of having to lug water out every day through the snow...yikes! I don't plan on heating the coop. Beginning this week I'm going to start "layering" their floor bedding. I use pine shavings. Normally I just sweep/clean the whole coop out every 1-2 weeks, but now with winter coming on I'll pick up poops/messes individually and let the bedding start compacting for winter. I'll probably end up with about 6-8 inches when all is said and done. My ventilation is good so I'm not worried about that. It's funny, you love your flock and it's hard not to remember that they don't like to be 'warm' like humans do...eek! Wishing you all the best!!