I be been sick and unable to go out to coop. When I went out this evening with my husband, I found two of my hens Losing feathers and looking awful. There are no bugs or moving things in them, but their feathers have a kind of white dust-like substance all over them. I really need help because there are too many diseases to read through to find what I'm lookimg for. I hope someone here can help. I didn't think they molted in the winter. We live in Vermont and it's been below zero the last couple days. What is this? Hopefully, these pictures wil help. It's Rose, a RIR, and Debbie, a Black Austrolorp.