Reading all your posts about nesting time squabbles, I realize we have not seen that in our flock. Maybe we aren't there when it happens.
After the first four years of adding coops to the run, we finally have a walk in coop that is 8x10 with roosting bars all around. Everyone has their place. When new young pullets first start roosting up on the bars, they settle on the lowest one and naturally go up last.
These days, when it's chilly outside, we go out at dusk and they are already in and roosted. Maybe the squabbling already happened, but we have never seen it.
We do have two roosters, but only 13 hens and I think that is not quite a workable ratio. At the moment, one rooster has his own run and coop, separate but right next to everyone. He hangs out with them along the fence. The two roosters are not fence fighting anymore, so we may soon be able to combine them. We'll give it a try when it warms up some.
As for new chicks this year, I'm hoping one of my girls raise a few for me. The reason we got a second rooster is that a year of broodies did not result in a single chick. Cooper, the separated rooster and my avatar pic, seemed to only go after the old ladies and they don't lay!

Wordy, Birdie and Gertie are well over 8 now and they were his favorite girls. They are Australorps and I believe that it's normal for them to live a long time. I think they are relieved to have Ralphie taking care of the flock. He is a Buff Orpington and tends to like the Buff ladies the best.
Have you all experienced segregation in your flocks? Mine hang out with their same breed mostly. That's so interesting to me.