“I believe the basis of their violence is territorial dominance and is apparently a breed trait. A trait such as this in not usually overcome with Love or “training”.”
It isn’t just their aggressiveness. It is their jaw power. Combine the two and you have a potentially deadly combination.
No, it’s not power. It’s the “aggression”, or if you will, the terrier tenacity and relentlessness. PBTs tend to keep at it. That is the #1 problem with them; they don’t let up and let it go.