Ok, so I had a Blue Splash Marans that was about 6-7 weeks old and very aggressive towards my other pullets( I wasn't sure if it was a pullet or roo) and I have a "special needs " pullet that it would pick on but then again, it picked on everyone and then would settle down but was always looking to peck at someone. Anyway...I exchanged it for a sex-link RIR ( not sure exactly the name there) that is only about 4-5 weeks and that chicken is doing the exact same thing ! My oldest pullet is 9-10 weeks so she( I think it's a she) is much smaller but just as feisty as the Marans. Is this normal and what should I do or expect? I am new at chickens. I know there is a pecking order but, after that is established, I just want everyone to get along. Also, my "special needs" chicken is vulnerable.