"...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...."
Dogs
by Robert McCammon
"...After years of having a dog, you know him. You know the meaning of his snuffs and grunts and barks. Every twitch of the ears is a question or statement, every wag of the tail is an exclamation...."
Random Facts :
Chihuahua's
Soft Spot
They have a “soft spot.†One unique Chihuahua fact is that, similar to newborn humans, these precious pups have a soft spot on the top of their skulls known as a molera.
Chihuahua's
Companionship
Chihuahuas are companion pets. Unlike many breeds who were developed for hunting or herding, the Chihuahua breed was developed solely as a companion animal and does this job very well.