I'm posting this in the allergy forum as well, but it just seeems like other parents of kids with SN seem to experience this more than the rest of the population which is why I'm asking here too...
My son is four years old and has a handful of true food allergies, as well as a definite intolerance to milk. Shortly before his second birthday we went GFCF and he stopped eating the foods he was allergic too. I noticed a huge improvement in his mood and behavior with cutting dairy, though didn't notice too much change with the other foods although one particular intolerance that we found out about a few months into it improved his digestion a lot. I was no longer seeing tons of undigested food in his stools and his development overall took a huge leap. (Suspecting an ASD was part of why we started GFCF). We've stuck with this diet for all this time because it was seeming to help.
Fast forward and the past several months, his behavior has been getting more and more out of control. His mood is terrible. He cries and tantrums off and on all. day. long. He's driving me nuts. Its pretty much exactly how it was before we figured out dairy was such a problem, except that his development is more on track than it was (though still delayed and gets OT, PT, and speech). We started Feingold a few weeks ago with no improvement (though I know they don't really cut all sals completely.) His poop is all undigested food again too.
I received such great advice here last time around, and I am hoping this will sound familiar to someone and hopefully we can get some ideas for how to help him. I really have a strong feeling his mood and behavior are related to his diet. I am wondering how to proceed. IgE testing? Failsafe diet? Vitamins/minerals? Other ideas...? I am going crazy walking around on eggshells and listening to him scream all day long and I know this is no fun for him either. TIA!
ETA: He also has hypotonia and suspected Apraxia. I've read some things showing a correlation between these and malabsorption etc, which is why I'm mentioning it.