I have 8 1 month old chicks who are spending their second day outside. Although they run around in the run a bit, the older chickens (2 months) are pecking at them every once in a while, and the 1 month olds huddle in one corner of the run in between running around. They get chased for a few feet here and there, walk/run around, then go back to their corners. Is this normal???? Is this just part of the pecking order??? They aren't getting pecked constantly, or hurt, it just seems like the older ones want them to know who the bosses are. When should I be concerned??? What's the best method for introducing the younger ones into the flock????