Chihuahuas are pretty smart dogs and come in as the 67th smartest dog in the smartest dogs list.
Besides being pretty smart and intelligent Chihuahuas are also pretty sassy breed of dogs as well.
Chihuahuas are pretty good family pets and are pretty affectionate and loving but you must be very careful in how you punish the dog because Chihuahuas are easily frightened or become nervous and may become aggressive if you don't know how to punish them correctly or train them correctly.