Thought I would put this in the wider doghouse, we have a 14 week old Rhodesian ridgeback puppy who had always been snappy, we have tried all the usual things, crying ouch in a loud voice (makes her worse) getting up and walking away, turning our back on her, saying "no biting" etc and she's still the same as the day we brought her home
I'm at my wits end don't know what to try next.
She's fabulous at clicker training won't bite then but outside of training she's awful. It's ruining our enjoyment of her, I've list count of the tips that have holes in them and food DS had holes in his arms as well 
Oh also do the toy in mouth thing as well, the DCs are great at this bit it doesn't help. She bit me on the face today unprovoked.
Same with the jumping up tried everything.