Well, after an approximately 36-hour-long stint at -14° F and below, air temp, followed by a day just barely seeing a positive number on the thermometer, we're finally in the positive teens again and it feels so nice out!
The girls did okay in those cold temps, but it was rough. That was the coldest day we've had here since owning chickens, at least to my memory. To prepare, I baffled a few spots in the coop to make absolute sure that no drafts were hitting my bird, and made sure the bantams were tucked nicely between the bigger, fluffier hens each night. I also brought all the roosters into the coop for the extra body heat and so that they were better sheltered as well. During the day, the boys went back to their pens, and I went out every couple hours or so to break open their waterers for a drink and grab eggs before they split in the cold. I was definitely scared, but the girls did survive it, for the most part.
I say 'for the most part' because by the end of the first day, I went with my gut and brought Kate and Scooter inside. Kate has been loosing weight over the past few months with no apparent reason for it, and my suspicion is that, at 8 years old, she's simply approaching the natural end of her life.
Anyway, she was not handling the cold well, and with her weight loss, I didn't think she would survive another night. Scooter had been iffy off and on all day, and I didn't want Katie to be alone, so I brought her in as well.
Day 2 is where it really got ugly. Myrna's frostbite, which had already occurred from the thaw and refreeze last week, had caused her comb to swell so bad that it was standing straight upright, so I brought her in and put her with Kate and Scoot. On top of that, both Roscoe and Dante had wattles so swollen I wasn't sure they would be able to eat and drink past them, if they were even willing to. They're both part of rooster flocks and I didn't want to split them up, so I brought all of them inside. Roscoe with Rufus and Russell, and Dante with Darwin and Murphy. They're in small pens, but at least they're out of the cold and the swelling has gone down. It should be above freezing for a while starting today, so they can go back outside, thank goodness! It gets a bit noisy with six roosters in the house--seven if you count Winston! Even worse is that Crashie was having some issues with not having full access to water to snoot her nostrils out, so she had to be brought in as well, along with Malcolm. Crash makes the roosters seem quiet.
Just try to have a conversation with her in the room! I'm definitely not missing her time as a house duck!!
Anyway, to make a long post just a hint shorter, we all survived! The girls have relatively little frostbite from the experience (besides Myrna, obviously, and the rest is just a few comb tips on some of the younger birds). It looks like most of the boys I brought in will have some comb and wattle loss to frostbite, especially the boys whose wattles swelled. Everyone else is looking good despite it all.
Oh, just to finish off the post, here is Myrna, who decided to fly out of the makeshift bathtub pen and perch next to the toilet paper on her first night in, and Scootie, who was looking for a nice place to snuggle I guess.
Unfortunately, Izzy passed away last year and I wasn't able to cross her to anyone in order to confirm whether she was Splash or Blue. 
Editing to add, she was a Meyer Hatchery BBS Ameraucana. Meyer's is one of the few hatcheries that does have true Ameraucanas, so I assume Izzy was pure for the breed, just not show or breeder quality because of being from a hatchery. (Edited again because the u and i keys are too close together...)
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I left all these windows open except the one to the left here because snow was blowing in.
