That sounds completely logical to me.
I was really struggling with how to do the best for my birds during that. On the 2nd day, I put a heat lamp in my run, which is largely covered with plastic. I also didn't let them out into the yard for that week, or whatever it was. I have 3 neighbors with in about a 4 block area that have chickens. I noticed on the 2nd day of that cold snap that they had heat lamps in their coops. That's when I put mine up. I was not comfortable putting it in the actual coop, as I think it is too small to be safe. I screwed it to the framing in the covered portion of the run. It was by no means warm in there, but not quite so cold. The coop still got to -16 inside. I was so afraid I would have dead birds. Guess I just lucked out. Today I was out there for about 15 min with them. None of them sneezed or coughed. I was especially worried about "Buff". She is my cream & brown Aracauna/Easter egged or whatever along that line. She was in a moult....and pretty slim on the feathers.
You know, I should really check in with my chicken loving neighbors & see how theirs are. Love to get together with you & maybe that gal from Ulm to talk chickens. I've learned a lot, but there is still a TON to learn. I'm a nurse & have a few patients that have chickens, too. I talk chickens whenever I have the chance.....I think I'm infected! Lol. I will be insulating my coop this sat. I will also modify the ventilation situation. Have a great day.
I live out by Vaughn. I work in the lab in GF and the ladies think I'm a crazy chicken lady! My girls and I love our birds. We raise show quality bantams in Cochins, Salmon Faverolles, blue laced red Wyandotte, and d'Anvers. Is the lady from Ulm, Vickie? She's great and a wealth of knowledge. She helps the kids a lot in 4H. Anytime we go to a show, I always bring a list of questions for her and the judges.
We have an insulated coop. I put up an oil heater this year for when it gets below zero to make sure we don't end up with frostbit combs on the show birds. They freerange most of the yr during nice days if they're not in breeding pens.
Keep warm everyone!