"...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...."
Three dogs survived the sinking of the Titanic. They were two Pomeranians and one Pekingese from first class cabins.
Chihuahua's
Breed
Chihuahuas are a Toy Breed. According to the American Kennel Club (AKC), the Chihuahua is part of the Toy Breed category along with Shi Tzu, Pug, Pomeranian, Pomeranian and several other small dogs.