My wife was able to get Bacon to listen to her give command pretty well. With regard to me, I play tug with Bacon all the time so he never lets go if I have a toy and we are playing. Regarding the growling he sounds like a ferocious beast while playing tug as well, I think it's just a bully thing. I would work on a give/drop command with him, also keep in mind that he is only 9 weeks old and bully puppies are extremely mouthy. Just be consistent and he will get it sooner or later.