I heard the hens upset in the middle of the night. I went out with my dog, and a flashlight, and was wondering what upset them. My dog and I walked around the coop, and didn't see any tracks. Then I thought the snow must have slid off the roof. This morning when I looked it seemed like that is what happened.
It is upsetting to have to go out in the dark to see what the chickens are upset about.