My year-old hen has bad looking swelling on the webbing between her toes. It looks kind of like somebody put a small ball under her skin, and is worrisome. Also, another hen is being bullied something awful. She perches on the windowsill unless the other chickens are absorbed in eating. Otherwise she sits up there all day and night. If she comes down the ducks and some chickens peck her quite aggressively. Nothing odd has happened to this chicken that I'm aware of. She looks and acts quite normally, so it just doesn't make sense. I'd appreciate any suggestions you may have. Thank you.