I'm not sure what else you can do. It's great that mom is open and willing to read the links you provide her with but if she isn't going to do anything differently than it's sorta pointless. I would maybe suggest to her to ask her doctor about these articles. If the doctor agrees with them and tells her so, maybe she will change than?
It's gotta be tough for the little guy!! With that many poops he must be getting diaper rash from time to time?