#13 It is particularly important to take the occasional stubbornness with humor and not to give up.
#14 Set clear rules for the dog at a young age.
#15 Basically, the Bully tries to please his people, but prefers to follow commands that make sense to him.
If he doesn't want to, it's difficult to convince him. With a positive and consistent upbringing, however, you will get a loyal companion and friend for life.