Hedemora, a native Swedish breed, may be the most cold hardy chickens in the world. They routinely lay eggs down to 5°F and free range at -5°F for hours at a time. They have a unique layer of down under their feathers and some birds of this breed have fur-like feathers that cover their bodies. There is quite a bit of variability in this landrace that over a period of centuries adapted to a climate in Sweden that is nearly on the same northern latitude as Anchorage, Alaska. Hedemora come in various colors. Their outer feathers may be hard or fluffy, and their legs may be clean or feathered. There are probably between a thousand and two thousand of these birds remaining in the world. Here's a hedemora pullet:
And here's a hedemora cockerel:

And here's a hedemora cockerel:
