Welcome to NeuroTalk Jeff. I don't have knowledge in regard to that, but we have several other forums here that might offer some clues. There's the children's health forum:

http://neurotalk.psychcentral.com/forum9.html

Also the epilepsy and seizure disorder forum:

http://neurotalk.psychcentral.com/forum11.html

And the hydrocephalus forum:

http://neurotalk.psychcentral.com/forum14.html

Maybe if you pose this question in those forums as well you'll find some clues.

I'm sorry your son is having seizures. I hope it turns out to be something that can be treated with diet changes. Take care and give Jim a hug from me.