"...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 Woodrow Wilson
"...If a dog will not come to you after having looked you in the face, you should go home and examine your conscience...."
Three dogs survived the sinking of the Titanic. They were two Pomeranians and one Pekingese from first class cabins.
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.