Hi there Wild-Star I am sorry that your girls are still giving you grief.
My flock is mixed age, two just under 4 years [one of which is Pekin], one just under 3 years [Pekin], one 2.5 year old [Pekin Frizzle] and one 1.5 year old.
As I mentioned on my earlier post, broodiness and hormones cause them to become antsy and pick on each other at times but on the whole, they get along fine.
However, just in the last couple of weeks, for no apparent reason, the 1.5 year old has decided that she does not want to be bottom of the order any more and managed to work her way up by picking on and demoting the just under 3 year old. However, the Pekin Frizzle did not submit so easily and there was a lot of chest bumping, raised hackles and scrapping.
Eventually the Pekin Frizzle gave up but now, the 1.5 year old is not content with her submission and continues to pick on her but does not pick on the previously dominated 3 year old.
The Frizzle kept her distance from the flock for a while and spent more time on the deck with her human dad than with the flock but just in the last couple of days she has gone back to spending more time with the flock. The youngster still chases her off occasionally but things have settled down a little now. We do intervene with the occasional verbal scalding [which they respond to] or gentle squirt with a water pistol when needed.
At roost time, they all roost together like nothing has happened.
All very confusing I know, but basically it goes to show that even the friendliest flock can go through changes.
My advice, give them lots of room and unless blood is drawn again, leave them to it, they will work it out. Or, if all else fails [previous suggestions], you may be able to find a new home for the bully. I know it is upsetting to consider rehoming one of your pets but if they are causing you and the flock stress, it may be for the best. However, if going down that path, please let the new owner know why you are rehoming her. In a new flock she may not behave badly.