The little Chihuahua is a well-balanced dog that has a typical insolent expression on its face. Its head is shaped like an apple with or without fontanels, which is the little indent on its skull. A Chihuahua should not weigh more than three kilograms. Its body is slightly longer than it is in height. The eyes are big and round, very expressive but not protuberant and dark; the ears are big and are held up when the dog is alert and slightly inclined to the sides when it is resting. The neck of this dog is slightly arched, its ribs are wide, but should not have a barrel shape; its tail is moderately long and is carried up high, elevated and arched in semicircle pointed towards its back. The tail should not be in between its legs or docked. There are two varieties of coats on Chihuahuas which are short and long hair. The long hair has a soft texture is straight or slightly wavy with an outer coat and has fringes on its ears, neck, tail, feet, and tail. It should not be thinning on any part of its body. The short hair is soft, adhered to its body and shiny. They come in a variety of colors.

Ideal owner:
This dog is considered the smallest of all breeds and it needs to live inside a house or apartment, however keep in mind that it does move around a lot and is very active. Often times smaller dogs are not aware of their size, and you will be able to notice this aspect by how the Chihuahua barks. The Chihuahua is a dog that shows a lot of confidence and is very sure of itself. It prefers being around other dogs of its own breed. It is very territorial and will protect its owner wholeheartedly. Chihuahuas love the good life and love being spoiled and getting a lot of attention. In order to avoid it from becoming an aggressive dog that barks as an adult it is necessary to train it and allow it to socialize with other people and other dogs.

The weight of an eight-week-old Chihuahua should be around 500 grams. The growth of this very small dog depends on its line of breed. An adult Chihuahua should weigh around three times the amount it weighed at the age of three months – this is a good way to indicate that its weight is in order. If you are interested in getting a Chihuahua avoid getting the smallest one, as these are more likely to having health problems. Choose one that has a well compact body and that has an extroverted and confident personality. Shyness and nervousness can lead to problems as it grows into adulthood. Adolescence is one of the most fun stages of a Chihuahua as it shows its balanced temperament but it loves playing persistently. The coat and colors of the Chihuahua hardly changes as it grows.

General health:
For a dog the Chihuahua has quite a long life span and can live up to twenty years – so if you're looking for a dog that will be around for a good time, this is the dog for you. However, it is important to know that there are a series of problems that do affect this breed which include split palates, secondary glaucoma, hemophilia A and various problems with the valves of the heart but these are not very common. Kidney stones and hydrocephali and pulmonary stenosis have also been seen but it is not alarming or common either. Shoulder dislocation can also occur. The owner will need to know that open fontanels over the skull are accepted in the breed and require delicate handling. Obviously Chihuahuas with longer hair require more grooming than the ones with shorter hair but in general Chihuahuas are easy to take care of and feed. Hypoglycemia has also been reported in this breed.

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