I have 5 chicks. 2 are 4 weeks and 3 are almost 3 weeks. One of the older one had picked all the little tail feathers of a younger one. She is the smallest. I think they were blood feathers as there was blood. Anyway. I removed her and a friend to a separate brooder. I'm wondering will the pecking start again if I put them back? Or will it continue if I put them all in the coop with the big girls? Did the older one pick on her due to boardom?