Yeah, I think there is a board now for healthy eating and healing or something along those lines. If you can find it, you should be able to get some good help. Anyway, yes, food allergies can wang a kid out. Dairy stuff (this can be lactose [this is derived from whey and usually just causes constipation or other bowel discomforts] and/or casein [some kids can't break down this protein]), eggs, corn (gluten), wheats (gluten), sugars, soy, dyes, the list can go on and on. Many of these allergies seem to go hand in hand with the kids who are diag w/ADHD or on the autism spectrum, unfortunately. Your friend should look into elim diets like cf/gf for the 8 yo, and you can grab good info on diet, recipes, kefir'ing, gut healing and the such on sites like from Dr. Mercola and also following the BED diet (sorry, no links!). HTH!