Hey all, I have a newbie question for you! My 2 1/2 wk old chicks are in a brooder in our house. All of a sudden they've started flying around trying to land on each other! One of them does it the most, she almost tries to stand up tall and starts flying around and at the others. It's like she's trying to scare them! I'm worried - is she a bully?? Do I need to separate her?? All of them do this behavior, but she does it the most.