We have a 9wk. old RIR who charged at another pullet (who is same age and seems to be a "she") and each time she went towards the other her neck feathers flared out like a typical adult rooster does to a threat. I haven't witnessed this in other hens...do all chickens regardless of sex exhibit this behavior sometimes? It wasn't a big deal (as far as aggression) but those flared feathers startled me. We did just recently remove 6 chicks from our flock so maybe there is a new pecking order establishment going on? So I'm just wondering if anyone has hens with neck feather flaring or could this be a rooster???