I just started with cracked corn this week added to their reg food. I do half and half. Hopefully that's enough. Just got in from doing chores and the silkies all came out to say hi. I do not use heat lamps just wood chips in coop and same plus hay in run. No water heater just black rubber bowls I stomp out 2 times a day and refill. Their run is enclosed with shower curtains and plywood except for door. I sat for about 10 minutes warming up in it today since its -26 with the wind. Did get geese into garage. Ducks are under deck. Seeing as it has about 2 feet of snow on it I think they are nice and warm. They've been out when I did chores for about 5 mins then right back under.