Despite this, this dog is actually more likely native to southern Mexico and is said to come from a more ancient dog called the Techichi, which was popular during the seventh century with Aztec and Toltec tribes. There are other speculations that this breed comes from an ancient Chinese dog and others that connect it to the fennec fox that is native to northern Africa as well.

Whatever the case, this breed has been a well-known animal in Mexico for centuries. As travel to the southern parts of North America became more popular in the 1800s, this breed was finally noticed by European travelers and breeders, who brought the dog back to Europe where it immediately became popular for its easy portability. The breed did not become part of the American Kennel Club until 1923.

Description: With an average size on only 2-6 pounds, many would assume the Chihuahua is a fragile breed, but realistically they are well-proportioned dogs that are fairly sturdy. The smallest of this breed are often referred to as "Teacups," although this isn’t a registered or AKC recognized name. The breed is longer in body than they are in height, with a fairly stout shape and a long, slender tail that often curls up onto the back. The most striking feature on the Chihuahua is a small, apple shaped head with beautiful pointed ears.

The coat may be barely existent and coarse, but there are also Chihuahuas that have thick and wavy hair. At one time there were a number of long-haired versions available, and while there are still some around, they aren’t as predominant as the short haired variety. This breed comes in a variety of different colors, and may even be two different colors, although their most common colors are tan and black.

Life Span: 14-16 years

Common Ailments: May be prone to problems with metabolism, especially hypoglycemia, so owners should be careful to feed them in small portions a few times a day. This breed is also prone to Patellar Luxation, or the dislocation of the kneecap. This is a common problem in small dogs because they are jumping on and off high furniture and in and out of cars. May also be prevented by careful selection from breeders.

Suitability with Children: No, especially small children as they may be snappy. The dog that is.

Suitability with Other Pets: May be territorial, although they can be socialized from a young age to be compatible with other pets.

Living Conditions: Excellent for almost any living situation, as Chihuahuas do not need much exercise and don’t take up much room.

Training: Need to be consistently housetrained from a puppy, as they have a small bladder that may cause them to "tinkle" in the house. Will work best with good obedience training but not too harsh discipline. This dog will also respond best to a gentle voice.

Exercise Required: Low

Cost of Maintenance: Low

Breed Temperament: Without a doubt one of the smallest breeds around who has more bark than their bite. These little dogs definitely have big dog attitude that makes them hilarious to watch as they run up and down the fence barking ferociously at neighbors walking by. This attitude may get them in trouble with their owners though, as they tend to be a bit territorial, and can be aggressive towards other animals. Although it is not recommended to have them around small children for this reason, if these dogs are properly trained, their aggression will stay in check.

This breed makes an excellent pet for a couple with no children, older children or for someone single who is looking for a companion dog. This breed loves being involved with whatever their owner is doing and will be happy spending the day running errands with its owner and is a loyal and dedicated breed with lots of spunk and energy. Keep in mind that when taking Chihuahuas, especially a Chihuahua puppy, Teacups and short hairs, outside in cold climates, it is best to only have them out for short periods, as they are not very tolerant of the cold. You may also want to consider a sweater or covering.

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