"...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 Mark Twain
"...If you pick up a starving dog and make him prosperous he will not bite you. This is the principal difference between a dog and man...."
Random Facts :
Chihuahua's
Size
Chihuahuas are the smallest breed of dog in the world. Most people won’t dispute this fact about Chihuahuas as they can be as small as just one pound when fully grown!
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.