He is often smiled at as half a portion. But when you get to know a Chihuahua, you are often amazed at how much temperament and pluck such a small dog can have. A shy, fearful Chi is fairly rare, although it is said that the shorthaired Chis are said to be more dashing and spunky than the slightly more docile longhaired variety.
Do not touch a strange Chihuahua without the express permission of its owner. Even if he can't hurt anyone seriously, he has to be trained and controlled to the extent that he doesn't bother other people or even endanger himself by barking incessantly or roaming around too independently.
With the appropriate adjustment to its body dimensions, you can even do dog sports such as agility and obedience with it!