I've seen a few posts about hens and/or roosters being away from the group and having to go through the process of establishing their former position. It's something I've never observed be it that the chicken had been away due to sickness, maternity duties, or confinement for any reason. Much like your hen Zorra, they just drop right back in at the position they were at when they left.
Related to this is my obsevation that often the pecking order changes for individuals depending on what challenges/circumstances the group find themselves in. Individuals have different skill sets or duties.
As an example it seems to me and others that the hen second in the heirachy is resposible for keeping the other hens in line and first line of defense when intruders appear.
Again ime it's the junior rooster should there be one, who becomes responsible for chicks once their mother finishes teaching and protecting them.
(This might an explanation for what you are seeing
@ManueB )
I don't claim that this responsibility is willingly taken on or has any kind of alturism attached to it, they just do it. I want to know why.
Say there is conscious choice involved. Would this mean an individual can refuse those duties and maintain the standing in the tribe?
There can be no doubt that chickens discipline one another. Watching chicks pullets and cockerels learning their place in the heirachy isn't done because the rest are just bullies. There's a purpose. There seem to be rules. Rules are structure and one the main function of rules is to produce a more cohesive and less violent society. Chickens, especially the hens, seem very good at this.