The last coop I had was 4x4x4 and I had 6 hens in their. They couldn't free range much because it was -50 and they refused to go outside. My new jersey giant started eating the other one and I had to kill it!
What did you expect from over-crowded birds?
If you *really* live in Alaska, and *really* have chickens at all -- which is hard to tell because your stories vary so wildly -- this is the article you need: https://www.backyardchickens.com/articles/cold-weather-poultry-housing-and-care.72010/