Thank you. I thought they would be ok, but I got my last chicks in spring, and temps were going UP, not down. I know the cross-beak won't make it. I don't want to put these little ones out with my big hens yet. They couldn't reach the perches in the hen house, which was finished as my girls hit full size. But if they can run with a heat lamp at 39, and without one above that, my electric bill will be grateful. I left the light on part of last night and observed through the screen door. When they were under it and huddling, I left it on. When they were perching far apart to air off, and only penguin was under it, I turned it off for the night.
I know my cross-beak won't make it, but my grandchildren were here when I got the chicks, and now she is gaining weight, I don't have the heart to put her down. I also don't have the time to hand feed and change chicken diapers. In the house isn't so safe, 4 house cats, 3 dogs (all pretty large). So I'm letting her be a chicken, but when she looks like she is suffering I will put her down. Or the winter may take her. She'll have the days her creator gave her unless she really appears to be suffering.
I don't know how old my chicks are, when I got them at the feed store they were starting to feather out. 4 of them are at least 6 inches long now, and fully feathered. Penguin is catching up too.
I actually built the greenhouse, and planned the chicken pen in it so I'd have a place to bring my big hens for a day or 2 if we have a hard freeze and I have to keep their water thawed. I about froze last winter trying to keep them watered, it was freezing in 15 minutes in their coop, which is protected from west wind and rain, but nothing else. The chicks in the feed store arrived just as the greenhouse was being finished out. It does allow some drafts, aka ventilation, but up high, to carry heat and humidity off even if the windows are closed. Plywood down below, and well sealed perimeters with chickenwire and drainage gravel to keep rodents and other stuff from digging in.