This is bizarre- my Welsumer hen, Bon Qui Qui (aptly named, if you have seen the YouTube video), was fighting her rooster brother pretty often. Neck feathers were up, just like roosters fighting. Darndest thing. Too high testosterone maybe? Poor thing looked pretty bad. On closer inspection, gasp, one eye is gone! She's in solitary right now to recover. Has anybody seen hens fight like roosters?