Chihuahuas are often described as fiercely loyal, sassy, plucky and sometimes mischievous. Some have a reputation for harassing strangers, but a well-socialized Chi is usually companionable and playful. Most owners agree that Chihuahua temperament has a great deal to do with the pack leader. Chihuahuas can be very protective of their owners and are often a source of endless amusement. The breed generally loves to stay warm by lying in the sun, burrowing in blankets and furniture and, of course, cuddling on a friendly lap.
Towards other dogs, some Chihuahuas may seem aggressive, but this is usually part of their defense mechanism and protective instinct intended to warn their pack, their owners, and anyone who will listen that a strange dog is nearby. This tendency to bark easily and often may sometimes become a problem, but it is easy to socialize these happy little companions, exposing them to new people and other animals early and often.
Since Chihuahuas don’t require as much intense activity as other breeds they tend to be well-suited to people with restricted living space, but regular exercise and training is good to keep them fit, just like other breeds.