We've been working with a dietician in Riverside named Margaret Roche, with Roche Dieticians. We've been very pleased with her. Our first step with her was to first test for celiac disease (to hopefully exclude it, which we did). The previous poster is correct about the U of C, which has the best website for Celiac and a hotline. Celiac is 97% undiagnosed, and most doctor's are not informed. We received a host of incorrect information before the test that we were able to sort out ewith help from the hotline.
Marrgaret recommended a book called "Is this Your Child" by Doris Rapp. There's are elimination diets in the book, and we followed an adapted version of the multiple elimination diet. We're still in process, but we are uncovering a handful of allergies/intolerances with our son that were causing his eczema and moodiness.
The poster above is correct about sometimes the main foods a child eats can be what's causing the problem. Our son loved milk and scrambled eggs and both have now been eliminated from his diet. We've switched him to Vanilla Rice Milk (enriched) which has been a good alternative for our son, but not as much protein as milk.
It's been a long road of faithfully reading labels and having to think fast to ensure he's not eating trigger foods, but it's wonderful to finally see some relief. You're smart to investigate her diet, since I think food allergies and intolerances are on the rise and imo doctor's are lagging behind a bit on treating the root causes verses just the symptoms. To be fair to doctors, they only see the kids 15 minutes every couple months...we live with them. Subtle symptoms are going to be much more evident to you, and you're your child's best detective. Keeping a meticulous food journal is a must, including your child's symptoms.
Just be cautious when talking to natural healers...my experience has been there's a lot of "snake oil" for sale to desperate parents who want to see their children well .
Best of luck!
Update: I know this was posted a long time ago, but I remembered someone recommended NAET allergy treatments and wanted to give more information in case anybody was reading this post. Beware. I just saw in the news that a man who was receiving NAET treatments for a peanut allergy died from an anaphalaxic.