The world's smallest dog breed, by definition, is beloved by many and oddly hated by some. These pint sized pooches are loyal and usually "one person" dogs, faithfully following their owners everywhere. Velcro dog, anyone? I was first introduced to chihuahuas by a dear friend of mine who rescued them by the dozen, it seemed- and found all of them amazing homes. I fell in love with them when I realized how immensely loyal and courageous they are. Many know that they are from the Mexican state of Chihuahua, but did you know they originated from the ancient Aztec and...