My little boy has a metabolic problem which means he needs carbs or his breath smells like acetone (fingernail polish remover). You say not to eat much after 3 p.m., could he have fluids with Sugar to keep his carbs up?
Also, he is a poor eater, and I'm not really sure he will drink the mixture. But, I'll try cause he is constipated, and I really want to see if I can tackle this possible ADHD.