Had a Boxer, Ginger, when I was growing up that was super protective of me and my brothers.
She would not let an adult (other than my parents) come into our backyard if we were outside.
One day I did something stupid, and my dad spanked me. As he was walking out of the room, Ginger bit him in the butt.
That made my dad love her even more! That was my last spanking.
Lol...
Good dog.