Maybe for something else to try my dad always broke this habbit raising dogs by when they bit he would grab their bottom jaw by putting his thum under their tounge and not letting go until they started to be submisive or whine... they dont like it and cant bite you when your holding their mouth this way... he always said that it didnt hurt them it was just uncomfortable... he did thid everytime they bit and eventually wouldnt do it because they learned that when they bit it would be uncofortable for them also... it worked for him every time.... he always would raise big dogs so their bitting as a puppy was not acceptable so he fixed this fast this way... (most of the time within a month) good luck
__________________  Kristin Wayne |