I have two groups of pullets, group 1 is 8 weeks old 2 buff orpingtons 2 black australorps. Group 2 is 6 weeks old 3 RIR 1 barred rock 1 blue copper maran. They were in separate brooders while the coop was being built but they we're let outside to roam together with some small chasing around but nothing serious. Now they're in the coop/run the run is 8'x14' and the biggest BO is getting pretty aggressive towards the smaller younger pullets, she chasers them away from food while she's eating, pecks them, and will chase them sometimes just out of the blue. Is this normal and should I be concerned? Should I intervene in any way? If so what should I do? Thanks