All dogs can become aggressive, but the difference between an aggressive Chihuahua and an aggressive pit bull is that the pit bull can do more damage. That's why it's important to make sure you are a hundred percent ready for the responsibility if you own a 'power' breed, like a pit bull, German shepherd, or Rottweiler.
Cesar MillanMother Nature's ruthless to the weak, but isn't arbitrary cruel or negative. Mother Nature saves aggression for extreme situations, and instead uses consistent leadership--to help keep things running smoothly. Mother nature doesn't rule by fear and anger, but by calm strength and assertiveness.
Cesar MillanWolves are disciplined not only when they hunt but also when they travel, when they play, and when they eat. Nature doesn't view discipline as a negative thing. Discipline is DNA. Discipline is survival.
Cesar Millan