I have 3- 8 week Barred Rocks and 6-2 week mixed bunch of biddies. I let the biddies out in the yard while I cleaned their brooder and just to see what would happen, I let out one of the BR's. The BR got a little aggressive, just bowing the chest out and flapping her wings. When do you think it would be a good time to put them all together? I dont want to wait too long, being afraid the BR's getting older may become more aggressive. Thanks in advance!!