We got 5 pullets 8 weeks ago and they get along wonderfully. We introduced 3 new pullets (the same age) yesterday and the 5 seem to be picking on them. At one point all 8 were roosting on the same post....but then 1 of the original 5 will start pecking at a new girl, the rest follow suit, and the 3 new ones run for cover. At this age, is this normal and will they most likely work it out and become pals??