I have 3 15 week old chickens and I am so surprised by our current pecking order. I have a barred rock who is the largest and most aggressive, a RIR who is sweet and docile not exceptionally friendly but allows us to handle her. And a skittish polish who seems to want to be the leader. She is often left behind by the other two but refuses to be left out. She will squeeze herself in the middle of a chicken pile up and I found her tonight taking the top roost. I had read that polish are sometimes picked on but she doesn’t seem to notice or care. It’s like she has appointed herself top hen!