On the food issue, whole foods don't matter if the child is allergic or sensitive to something they are eating. It's not just chemicals that cause problems, often it's the food itself.
I can't recommend any area doctors, but did want to offer a yahoo list if someone is interested. http://groups.yahoo.com/group/Positi...ng-Discipline/
It's Positive Parenting Discipline (discipline as teaching - this list is non-punitive and does not allow posts promoting spanking, punishment, etc). This group has it all! It has all the normal kid raising issues but there are also lots of kids with food issues and some with explosive tantrums.
My dd has food issues. One being she "over" reacts to hunger but she also cannot eat soy or yellow dye. However, even when we're on top of these issues she is still an intense kid. I am also reading The Explosive Child which is very helpful so far as long as you ignore the comments about medication.
I also recently looked up alternative treatments for ADHD and have put her on vitamins. She is taking Omega 3 and now magnesium. It may be wishful thinking but I think the magnesium has made a difference.
Oh, one more thing. For my dd I have noticed she goes through phases. I thought it was seasonal since up til this year she was always really difficult in the summer and pretty easy in the fall. This year she did a flip though and was easy in the summer and I was tearing my hair out in September. Seasonal allergens? Hormones? Some things you'll just never know.