If you decide to try colonics for her...find someone that performs closed-system colonics...they will be far more effective for her than an open-system.
Also...here is another website that you might find interesting:
Dr. Rapp is a physician who specializes in environmental medicine and pediatric allergies...she has found some amazing connections between kids behavior, emotional state, school performance, etc. and their exposures to chemicals and reactions to foods...sometimes very dramatic. She has some info on her website and also several books that you may find helpful.