just wondering how common it is for hens to fight or pick on another hen? i own 5 hens, about 4 months old. only when they are free ranging do i see hair stand up on some of them. and i see them mostly go after one particular hen. i feel bad for her. I notice in their run, they are all fine, but its when i let them out of the run to eat grass, bugs etc. any idears? also in their main coop they all sleep on the roost comfortably together. i just hate breaking up arguments with them. i usually go in the middle and say "knock it off girls" and they stop.