Digger and the Kid

So, looking after my aunt's son was . . . interesting. My ah-DOR-able westie, Digger, was being brutally abused. He's normally a very patient dog, but with my two-year-old cousin, he was at the end of his mile-long rope. He bit the kid. Hard. It drew blood. He had never done that before, but in a way it was a good thing. This cousin, who I'll refer to as "Leonard" has serious issues with understanding that dogs will bite if you pull their ears or tails as hard as you possibly can. My family and I are just very afraid that if Leonard does not learn this lesson now, that who knows when he'll mess with a big dog with a bad temperment and get seriously bitten or scratched up. Don't get me wrong, Leonard's a sweet kid but he just has a hard time figuring out ways to show his emotions without freaking out and hitting his head against whatever hard surface he can find and/or giving the closest person injuries. In all seriousness, he is a lovable little dude.
TTYL,
Little Red