IMHO, her instability and inability to come to grips with the new additions must be creating a very unbalanced situation for the whole crew. It's not just about her and the chicks anymore. I have to agree with Ashdoes: cull her. That's what I would personally do. As the commercial used to say... "Is it soup yet?"
I see what you are saying but I don't think I can kill her... I will try a few other options but I may have to re-home her.
