Hello all! I am new to this site and joined specifically to ask this question. We lost our entire flock last year to a wild predator and after reinforcing the coop we are ready to bring home a new batch of chicks. However our local feed stores get in only a few breeds at a time and we want a variety of different ones. I know that chickens, once they have established their flock, become territorial when you try to incorporate new members. My question is at what age does this start to set in? If I have 3 week old chicks and bring home a few new hatchlings will the older ones already start to attack the new comers to sort out the pecking order? I want the best for my babies and don't want to endanger anyone. Thank you for taking the time to read my question.