Selecting chicken breeds needs more consideration given to comb type, as cold climates can't avoid frostbite via ventilation and vaseline - best to choose better breeds from the start. Additionally, deep bedding is more of a project than indicated here, and has to be managed appropriately. Overall, picking a few areas to focus on more may result in a more helpful article. Good formatting and thank you for sharing!
This is a good summary of keeping chickens over the winter.
So much could be elaborated on further, or links provided. For instance, for your sentence about cold-hardy chickens, a link to an article here or on the internet about which ones are more cold-hardy would be helpful.
The part about "consider" lighting the coop should be changed a little as it is controversial. Maybe something a little lighter like, "If you would like to try get your hens to lay more in the winter, you may want to consider adding additional lighting." Then put a link or two about supplemental lighting in there.
The things you discuss here are great, just more information should be added or links so the reader can research that particular thing.
