Hi Kyles Mom,
I am no expert at parenting, I just have a few suggestions: try to find a way for him to channel his energy- some sport? swimming etc- sports help children in many ways than we can imagine- ' a sound mind in a sound body'
Its easy for me to say- but try not to let him know that you are worried about this- children are very sensitive and pick up on their moms emotions easily.
Best of luck- I am sure you will find a way to handle this. One of my friends told me 'God always helps moms'
Take care.