Ok, first a little background. We were refinishing the coop and had the 5 hens and 5 pullets in the 4x4 coop with a 4x8 run for almost a week (it took longer to finish the big coop than I thought). Everyone got along great. No fighting, the 2 month old got along great with each other and the big ones. I even had chemo and there were three days that they did not even get to free range. Ok, so yesterday afternoon they free ranged and then I put them into the new coop. They loved it, (Thought I had to force them in at bed time, they were pacing at the side to try and get out and go to their old coop.) This morning I let them out and my Ancona chick keeps pecking at my gsl chick. I mean just chasing her and a few time she got a feather off her back! Why did they do great in the tiny coop and now they have all this room and NOW they start fighting? I dont understand. The other chicks seem to step in and protect the gsl.