Hi. I'm very new and still learning but today I'm very alarmed. I have 6 four month old chickens who up until today have been doing quite well. I have one chick that is very much larger that the others (she actually looks unusual) but today I noticed that she was bloody under her wing. She doesn't have alot of feathers underneath her wings but today I see blood. How do I know if she's picking or if she's being picked on. Now what? should I separate her?