I have a Silver Laced Wynadotte who has a feather issue. She has all of her feathers, they aren't falling out, but the "feathery" part of them is mostly gone. The shaft of the feather is still there. She looks a bit like a porcupine running around. She seems otherwise healthy and I have looked and looked and can't see any mites or lice of any kind. I have looked several times on different days, and none of my other 14 chickens seem to be affected.