This is going to sound crazy, but in a way she is stiring up your flock for some reason, they don't want her part of that. When you removed her, did your flock calm down? If so, you may have one bird too many for that set up. The flock is my primary guide, and if they are not happy, I change things until the majority is happy. Tension in a flock is sometimes hard to pick up on, until you remove the cause, then the peace becomes apparent.
If your flock was calmer and happier without her, I think that is the change I would make. The wrong dosage of prozac might just kill her.