A few years back I had a RIR hen. (I only keep hens), that acted like a rooster. She was mounting the other chickens.. Guess she was stuck between Good and Evil.You might want to keep an eye on that aggressive RIR in case it turns out to be a rooster in disguise. On the other hand, yesterday I found one of my laying hens chest-bumping and kick-boxing with a rooster through the wire fence separating their pens. Tried to get video but wasn't quick enough with the phone camera.
