Hello - We are new to chickens and only have 3 girls; one Black Australorp and 2 New Hampshire Reds. They are about 10 months old. My black girl has started losing a bunch of feathers - it looks like they are the downy feathers around her butt, but I can't tell for sure. She is not bald, just looks "less fluffy" and the feathers I'm finding on the ground are short and fluffy. Is this a type of molting or should I be worried? It's mid-Feb in Maine - doesn't seem like this is a good time to lose your warm coat. This is their first winter. They live in a barn - they have it all to their selves. We feed them mash. They also get cracked corn, oatmeal, tomatoes and black sunflower seeds. Thank you in advance.