Quick question about chicken behavior- I have a cockerel and a pullet I have raised since chicks that are about 9 weeks old. I just got 2 more pullets from the feed store that are roughly the same age (perhaps a week or two younger.) I put them all in the run together and they seem to be doing ok- a peck here and there and the newbies get out of the way for the two I raised. Does aggression normally start right off the bat when introducing chickens or does it ramp up over time? I didn't really realize that I should have kept them seperate at first.