My 18-month old buff orpington has crazily messed up feathers going every which way and not lying flat. We started to wonder if she had gone blind in 1 eye, as she stands still with her head cocked sideways and lets us get much closer to her than we have been able to in the past. I thought her eyes were sunken, but on closer inspection it's really that the skin around her eyes is puffy and a bit lumpy. She is missing almost all head feathers. Any ideas? We have 100 birds and it's difficult to track each one, so I can't comment on her poop, eating habits or egg laying. I have noticed these symptoms for a few weeks now. She appears to not be wasting.