I'm in West Seattle with five 23-week-old pullets and it's been in the mid 20s in my coop this week. Too cold! Their water has been frozen in the mornings, so I've been setting my alarm to get up at dawn to give them fresh water. I hadn't planned to heat my coop or provide supplemental light, but I'm reconsidering. I put a heat lamp on for a while this morning, but I've read so many concerns about fire hazards that I didn't leave it on for long. My girls are all cold tolerant breeds -- Buff Orp, Barred Rock, Speckled Sussex and Australorp -- so I think they should be okay. But I also think they'd be more comfortable with some heat. Do other Washingtonians provide winter heat and if so, what do you use? I'm also interested in good ideas for heating their water. The only electricity I have in my coop is an extension cord. Thanks for any advice. And by the way -- no eggs yet. I think my BR is ready if it would just get a little warmer.
I have three week old silkies under broodies in an unheated coop. The mamas park themselves in front of the food dishes and the babies run around for about ten minutes at a time before heading back under. Once the sun is warm enough and temps are in the mid 20s the mamas take them foraging and they don't go under except a couple times an hour.
I just take fresh water to them each morning. No issues with anyone. The laying flock has an LED light but no heat in the big coop. Ameraucanas just have a little house and no extra lights the same as the silkies. Everyone is outside as soon as they can see.