I new at this chicken thing. I have 11 chickens that are 20-24 weeks. All of a sudden they are peacking each other to the point that half of them have bald spots. They use to get along great and now this. I don't have a rooster so I don't know what is going on. Please tell me how to fix this. I am freaking out. It just started a few days ago and it's bad. 
