I haven't been able to find this on the google machine. I have 1 Rhode Island Red and 2 Red Stars #1 they haven't laid a single egg in about a month #2 we let them free range as often as possible and have plenty of underbrush that they love to go through. We've had them locked up for 2 weeks now in their coop. #3 the coop was cleaned prior to confinement diatomaecous earth and a thick layer of hay was added to the pen. So what I'm seeing is that all of them are loosing feathers on top of their heads. They do have some pin feathers coming in. But they also look dusty around the eyes. Like someone has covered them in soot. I haven't inspected too closely. but they come right up to my feet. and that's the best description I can give. They look dusty or sooty. I let them out today. I noticed one is pecking at the grass and slamming her head into the ground!? the other two seem just fine. any ideas would be great.