Temperament...

Chihuahuas are prized for their devotion and personality. Their alertness, intelligence and size make them easily adaptable to a variety of environments, including the city and small apartments. While Chihuahuas are often stereotyped as high-strung, correct training and socialization can result in an outstanding companion animal.

Chihuahuas and Children

Chihuahuas are not well-suited as small children's pets because of their size and physical fragility. However, many Chihuahuas focus their devotion on one person, becoming overly jealous of that person's human relationships. This can be mitigated through socialization.

Chihuahuas also tend to have a "clannish" nature, often preferring the companionship of other Chihuahuas over other dogs. Also, Chihuahuas seem to have no concept of their own size, and may fearlessly confront larger animals, which can result in injury.

Cold

Chihuahuas are sensitive to the cold due to their small body size. Chihuahua owners often dress their dogs in sweaters or coats in cold weather.