Hi there - Sounds like your little one needs some infant proboitics,
http://www.google.com/#hl=en&q=infant+probiotics&...
I googled that... the other thing could be infant calcium.
You could also take foods enzymes, and calcium glutimate and citrate, (skeletal strength) and proboitics eleven.
www.creeksideherbhouse.com
click the logo for natures sunshine on the home page. The theory page is what we teach in our chat room. I am here in Austin, so you can contact me anytime from the information on the home page of my site.
That is where I would start. Each and every function of the body depends upon calcium to operate properly, without enough calcium for digestion the body will take the sodium content, when that is all gone is when you develope acidic reflux.
There is a list of books on the reading page you can get at any library or any good books store, for more research on your part.
Hope this information helps you.
Blessings
J. M