I have an 11.5 month old Barred Rock hen that constantly has off-center tail feathers. She is also my only hen that has consistently poopy fluff feathers which I have to trim regularly, not sure if that's related or not. She eats and drinks normally and is laying eggs almost daily. They free range after they lay eggs in the morning and she is keeping up fine with all the other girls. What could be causing this?Should I be concerned? It's very obvious but hard to capture in photos.