It is snowing up a storm here in Michigan. I have shared an article on what I have done to help my chickens for this snow storm and arctic chill that will be settling down over Michigan. They are tucked in, all snug as can be in their coop. There are extra layers of bedding and some added protein to their diets. I use meal worm for this. Your birds will use more calories staying warm in this weather and so I have adjusted their feed to help them. A heated water dish is also in the coop so that they have access to water. I plan on opening the coop as little as possible to keep the wind exposure to a minimum. For other tips, check out the Community Chickens Article.
On a more fun note… the dog is loving the snow.