Unfortunately Rocky was already dog aggressive at 8.5 weeks old
when I got him. (not normal for even an Akita at that age)
He was a bully at a very young age.
It wasn't that he was overly stubborn, it was more of a temperament
attitude problem.
With love, socializing building and training he turned out to
be a wonderful dog. (accept he is still dog aggressive.)

The springer: The reason I did not feel comfortable using it with my him, because of his dog aggression.