It gets c-c-c-c-co-co-col-cold-d-d!!!!!!! here. Maybe not as cold as Interior Yukon but way colder than pretty much anywhere in the US. Last winter we got about 1&1/2wks -40*C and over a month of -30.
The year before we got -56*C for a whole week of 6AM's and whole days of -50/-40.
The Plymouth Rocks(buff, columbian&partridge) all did well except all the cocks suffered frost bite on their wattles and combs. It didn't effect their virility come spring tho'.
The Orps...same,
RIR...same.
The Brahma(buff,lite&dark) faired real well and were the first to start laying.
The original(white) Chantecler were least affected although not my fave egg layer.
Over the 30+ years that I've raised chickens the worst for my weather is the Leghorns then other large combed birds.
The feather footed birds with smaller combs did not so bad so long as I trimmed their feet and/or kept the coop real clean.
Bigger framed heavier breeds with better feathering did better.
It's gotten to the point where I have put certain breeds together and let the survivors perpetuate.
The few birds I have left are wary&watchful of avian and terra firma predators, and forage widely but mainly in my "yard"...which is actually quite large with a varied landscape.
Some might say my birds of choice are essentially combining into a type of landrace.
The roo I have rightnow on some heritage breed hens(above) and the "landrace" hens is a PlymouthRock Barred. I dubbed his comb and wattles because he is good with the hens in that he's a gentlemanly bird but also alert to danger and will "sound" then make sure all the 25 hens are safe. I witnessed him fight a Merlin that had grabbed a pullet but he has never gone so far as to give a second look to any of my kids or grandkids or the multitude of visitors we get. He does assert his dominance over the ducks and turkeys(yes the toms too) but the geese are, as my g-kids say, "the boss of him".
From 25 hens I get 20-25 eggs every day from mid to late March right till late October. Even though I try to keep my coops heated, eggs freeze so I don't go out of my way to encourage egg laying during the cold months.
I don't know if I can be any more "organic" than what I'm doing already except perhaps breed some RuffedGrouse, SharpTailed Grouse, Spruce Grouse and Ptarmigan into my flockand let them eat totally naturally and roost in a spruce.
And yes I have thought of it.........☝but not long enough to actually do any research and/or fetch some of them wild birds.
Good luck
And blessings