I agree you don't discipline for hitting people by hitting them.
Know or learn his weak spot and use that for discipline. For me it would be staying inside when it's nice outside because I would rather be inside.
I hope you can nip this in the bud right now. Good post and good question.
https://www.google.com/#q=disciplining+a+child+for+hitting
Ed Winkle
How do you discipline your kids for hitting other kids?
