The aggressive one is a 6 wk old RI Red. Nice when she is by herself, but pecks to bleeding all the others (who are 2 weeks younger) when they are all together. I now have them all in one 4ft square enclosure with a mesh divider down the middle. The other 3 pullets ( another RI Red, a barred rock and a white rock) all get along fine, but I have to keep the older one separate. How can I successfully reintegrate all of them in 2 weeks when they all go outside to the coop and pen? I appreciate any advice I can get as I am new at this and trying to learn as much as I can. And, I LOVE raising chickens! Thank you!