I haven't heard of the Feingold program, but I am an educator and have recently attended a conference on sensory integration disorders, which includes ADHD. Some of the suggestions that were offered include offering acidophilus 1-2 times per week, feeding a protein-rich diet (every 2 hours), giving lots of vitamins, giving minerals (especially magnesium, but also zinc, iron, calcium, giving naturally occurring fats and oils (whole milk, butter, olive oil, flax oil, fish oil, whole-fat mayonaise), and also keeping well hydrated with water. Also you may want to keep him away from fluorescent lighting, and also phenols (lightweight odors: whiteboard markers, glue, paint, marker smells, wood burning fireplace.) Also do not feed any artificial sweeteners, the only safe one is Stevia. Good luck!