Hi! Thanks for the infor on HMF Neuro Powder. I actually AM using the Natren dairy free (chickpea) probiotic. So I'm actually wondering if it is the chickpeas he's having problems with. This is so frustrating. I know he's being bothered by something . . . (BUT he also desperately seems to need a probiotic). I always heard that Natren was such a great product (not saying it isn't, just that it might not be right for DS). Oh I'm just so frustrated!