Put him in an area (pnp) away from everyone every time he does it with a stern NO! No biting! when he's doing the action or about to. I will also take the child and sternly with their arms at their side/lap and sit them on their bum immediately with a firm NO! That's about all you can do right now or terminate the family because of it. I hate dealing with biting and I really have no tolerance for it.