I have 2 RIR & 2 AM/EE (purchased as Ameraucana, you all say EE) pullets, all 15wks. When they were chicks Dusk was bigger & top chick, with Rojo & Ehu following & Tawny seemed to be the bottom of the totem pole until they were about 6 - 8wks then the dynamics changed.
The pecking order then changed to Tawny, Rojo, Ehu, Dusk....Tawny & Rojo hang out together while Ehu & Dusk hang out although there are times Rojo & Ehu are grubbing together and Tawny & Dusk will be seen together. However, Tawny will turn & pick on Dusk, even sneak attack when Dusk is grubbing. They all chest bump but it's very obvious that Tawny LOVES to torment & bully Dusk. Tawny stands "guard" & always the first to eat, Dusk/Ehu are always the first to enter the coop at night, Rojo & Tawny need to be coaxed to go in.
Hubby's getting upset with Tawny for always & only picking/bullying/sneak attack Dusk. So far no injuries (although Hubby's ready to deal with Tawny), I know they need to work it out & it's part of their social pecking order. I'm letting it go for now but really hate to see Dusk "picked" on. She's a sweet, yes she's flighty & most timid of them all.
The last bunch of pullets I had (3 Wyndottes & 1 EE) the EE was top dog until one day one of the Wyndottes went with full on rebuttal! It was shock & funny to see but that put Topaz in her place. After that, no more picking or bulling....I'm hoping Dusk will stand her ground with Tawny.