Need some advice on my 10 week old german shepherd puppy biting. Im working with him everyday but losing ground on him biting my hand, Ive tried the yelp, putting him in his crate, saying no, making other startling noise but to no avail he will bite my hand. Ive read everything about not what to do and what to do but Im at a stale mate on my next move, he has broken the skin so I have to get control of this now, thanks for any help you can give me.