Chickens don't tell other chickens what to do which would constitute BOSSING, however chickens do tell other chickens who they can socialize with and to what degree.
In this respect a flock of hens is no different from a catty lunchroom table of 13 year old girls who set up a click or cabal.
Bossing in most ways has a positive connotation in that the boss tells the bossee what to do and in which manner to do it.
Don't confuse this with what chickens do which is to establish a hierarchy of one with the alpha hen in the top spot and to one degree or the other the omega hens below her.
I guess that 99% of the times that one hen or rooster seems to abuse one of its flock mates and never relents is because the flock mate that we see as being abused is in fact a headstrong and obstinate flock member who refuses to acknowledge the alpha bird's place in society.
All straight or single comb chickens has a tiny patch of short feathers on the back of the head about as big round as a BB and it sits at the base of its comb. They raise that patch of short hair like feathers to signal submission to other chickens.
When we breed strains like Silks, Polish, or Cochin with non-standard plumage and combs we are in effect creating a strain of chicken that is generally unable to properly function in society because they are unable to signal submission.
Mother nature is a just old girl and she would never have created an animal potentially as aggressive as a chicken without giving that animal a way to avoid conflict. That is something that only a human could think of doing.
In a real sense anytime you have a hen who you think is being bullied or picked on, that hen imo is showing her game fowl heritage by refusing to quit the fight as long as life remains in her body.
If you want to breed a calmer strain of chicken then cull the chicken being picked on, and only hatch eggs from those shrinking violets who turn the other cheek.
Otherwise good luck keeping peace in your chicken coop because brothers and sisters, you are going to need it.