We went through almost exactly the same thing with my Nelly. I kept trying to integrate her by means of a separate area in the same pen etc and they never would accept her, so finally I put pin-less peepers on the two worst offenders and over time I was able to take those off and they were still mean to her but not like before. I put multiple feeders and water sources in lots of spread out places in the run and put lots of hiding places for her. We had a pallet leaning up against the side of the run that she could duck behind and a chair she could go under that was a little low for the big fluffy bullys. THEN a friend suggested we get some new chickens and maybe she would bond with them or at the very least there would be some newbies to take their attention off of her. It worked really well. I bought three chicks that they raised til 8 weeks for me. Then I took them in and set up a little coop/run in my garage with garage to my basement open for warmth. Once they were 14 weeks I put that mini coop inside our run and they could see eachother but not touch. I alternated places where i could put the big ladies out and the little ones could have the run for a little while each day. Finally i introduced them and it was really cool - the bullies DID try to bully the new ones but not as bad as they had Nelly, so eventually one of the sweet new ones befriended her and now they are buds. (Thanks Marie for that idea) It took time but so worth it. To answer your OG question - yes they do still recognize them!