Sorry mate, the dog as to go.
Had a similar problem, however it did not result in the events you have encountered. My JR was snappy (as most are) however on two occasions he bit my son's hand, the first time not badly but caused a number of small puncture marks, the second was far worse inflicting a bad bite to the thumb. Up until that time my son and JR were inseparable. What changed, my JR matured and was no longer a pup and thought himself higher up in the pecking order in the Smudger household. The decision was not easy, but living with the possible results of a more savage attack made