7 of my hens have wounds on both of their wings. I have 10 hens and 1 rooster. They've all find perfectly fine living together for over a year. Nothing has changed. I noticed my Buff Brahma walking under my window and I saw her wing was red. They feel hard and they might be swollen. What is causing this and what can I do? Is my rooster suddenly being too aggressive? Thanks for your help.
