I originally started with six chickens, lost two to our dog, one to illness and one to bullying. I waited a few months then introduced two more chickens to the two I had left ( one a bully, one docile). The two new were as large as original but I noticed after awhile that one sided with the bully and began pecking on its partner that arrived with her. I have now divided the run and coops with two bullies on one side and the docile and new one on other. The new chicken, a Red, is acting strange. She won't eat, does not have good balance and just acts strange. The docile Buff is still laying and seems fine, but should I put her back with others and just leave the red by itself. The Buff bad the bullies get along fine and they all lay daily.