My 4 1/2 month old hens seem to have dry skin on their faces and legs. It has been getting colder at nights and I have never noticed this before now. They also get flaky skin stuck on their feathers. Other than whatever this is, they appear to be normal. I change their bedding regularly and they have free range to the rest of our property during the day, so I am not sure if this has anything to do with mites. Maybe I am being overparanoid. If it is dry skin, what would be helpful to use to treat it and is there a safe home remedy. Thank you!