I just bought two Light Brahma hens. I think they're about a year old. I noticed one of them seems to be missing the typical black tail feathers. Is this normal? Is this part of molting? She is very full and has feathers everywhere else right now. It just looks like she's got a big butt. Her body doesn't taper down to in tail feathers in the back. Did something get a hold of her and if so will the tail feathers grow back?