~~today noticed that one of my chickens was pecking the throat of another chicken. .I looked closer and saw that the one chicken had picked all the feathers from the neck of the other chicken and it was bleeding . it had also done the same but not as bad to another one .I saw her doing it . I took them out of the coop and put them in separate cages so the injured ones can heal and the other one don't harm anymore . but i don't know if the one is just mean or if they have mites that she was pecking at . all the chickens seem to be scratching and picking at themselves a lot . what should I do about all of this ?