[gemy]

This sounds like a terrible situation for all involved; my heart goes out to you.

I'm not going to assume all the trainers you used were incompetent, but they obviously didn't have the skills necessary to help you and Dixie Cup. I'm wondering though if they had any recommendations to trainers that might work.

I agree with another poster that recommended (if not already done), some chemical or neurological imbalance be ruled out as contributing or causative factors.

I have two suggestions; a) Caesar Milan or b) Monks of New Skete. My understanding is both have programs where they will take the dog, and do the intensive analysis and training to remedy your dog's behaviour.
The time away is likely to be benefical for all of you.

Baring that, is a rescue for Dixie Cup. Obviously this rescue must be prepared to handle her behaviour and provide an environment that would help her heal and find her balance again.

I really hope that you can find a solution for everyone's health and happiness.