When I first got my 4 hens, 2 were picked on by the others, resulting in a bald backend under the tail feathers. They've never regrown, but it does not seem to bother them, as they've been laying each day large to extra large eggs. Is there anything that can be done about this? I hate to see these red bald spots. Also, when their wings were clipped, the pens never grew back. I had pigeons years ago, whose feathers grew back and moulting took place. What is the difference here? Thanks, Johanna48