So, we have a 10 week old puppy, he's my 5th dog of this breed but my first boy. I know he's only tiny and almost certainly playing but he keeps attacking our legs and distraction with a chew toy or a sharp (but not too sharp) 'No' isn't working. He's really going for it and it hurts. I am nervous that he will do this to my 10 year old. I understand that he needs to learn what 'No' means and we're in the process of teaching him this but I've never had a dog that does this......help!