If I were her, the first thing I would do would be to take an old fashioned cleansing enema using an enema bag, perhaps two or three if she hadn't had a BM for several days.
The second thing would be to try to find a colon hydrotherapist nearby and schedule a series of colonics.
No matter what long term program she eventually adopts, getting her colon initially completely cleansed of waste matter is an essential first step.