J.R.
I suggest seeking a registered dietitian who specializes in pediatrics and/or food allergies. You may search for an RD using the search tool on the American Dietetic Association website:
http://www.eatright.org/cps/rde/xchg/ada/hs.xsl/home_4875...
If you have issues with this search, you may call the ADA for assistance at 800/877-1600, ext. 5000.
You may also search for a Board Certified as a Specialist in Pediatric Nutrition (CSP) from the following link:
http://www.cdrnet.org/applications/directory/Specialists/...
CSPs are RDs who specialize in pediatric nutrition.
Hope this helps. Good luck in your search.