Chihuahuas were originally thought to be descendants of an ancient, similar, but slightly larger breed associated with royalty in Aztec civilizations known as the Techichi. However, because of the lack of archaeological remains, it is now believed that Chihuahuas were brought to Mexico by Spanish settlers. The most current theory holds that Spanish merchants brought Chihuahuas to Spain by way of their trade routes with China and from there to Mexico. The well documented practice in China of dwarfing both plants and animals is the basis for the theory that Chihuahuas originated there.[citation needed]But another theory is that they originated in Egypt and were traded into Spain and later Mexico.
Chihuahuas were first taken into the United States by American visitors to Mexico.
[]Appearance
A tricolor Chihuahua
Chihuahuas are best known for their large eyes; small size; and large, erect ears. The AKC (American Kennel Club) recognizes two varieties of Chihuahua: the long-coat and the smooth-coat. Many long-coat Chihuahuas have very thin hair, but other long coats have a very dense, thick coat. Breed standards for this dog do not generally specify a height, only a weight and a description of their overall proportions. As a result, height varies more than within many other breeds. Generally, the height ranges between six and ten inches at the withers. However, some dogs grow as tall as twelve to fifteen inches. AKC show dogs must weigh no more than six lb (2.7 kg); the FCI standard calls for dogs ideally between 1.5 and three kg (3.3 to 6.6 lb), although smaller ones are acceptable in the show ring. However, pet-quality Chihuahuas (that is, those bred or purchased as companions rather than show dogs) can, and do, range above these weights, to ten pounds or even more if they have large bone structures or are allowed to become overweight. This does not mean they are not purebred Chihuahuas, it only means that they do not meet the requirements to enter a conformation show. Oversize Chihuahuas are seen in some of the best, and worst, bloodlines.
Chihuahuas come in many colors, from solid blacks to solid whites, spotted, or a variety of other colors like fawn (tan), chocolate, (gray), silver, tricolored (chocolate, blue, or black with tan and white markings), merle, brindle, and, each of these colors varies in shades and tones, as fawn can be a term to describe a tan dog from a very pale cream to a deep (almost red) tan, or any shade in between, and the chocolate coloration can range from a milky light shade of brown, to a deep mahogany brown, to a dark brown that is almost black.
[]Temperament
Chihuahuas challenging Great Danes; the smallest breed often exhibits great daring.
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 are not well-suited as small children's pets because of their size and physical frailty. 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. 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. However longer-haired chihuahuas may be fine without additional protection and in the summer may still be known to pant.
[]Health
A long-coat Chihuahua
A Chihuahua in submissive state
This breed requires expert veterinary attention in areas such as birthing and dental care. Chihuahuas are also prone to some genetic anomalies, often neurological ones, such as epilepsy and seizure disorders.
Another genetic abnormality in Chihuahuas and toy breeds is hydrocephalus, or water on the brain. This condition surfaces in young puppies and often results in the death of a puppy by the time that it reaches six months of age. It is thought that this disease is often diagnosed by the pup having an abnormally large head during the first several months of life, but other symptoms are more noticeable (since "a large head" is such a broad description). Chihuahua puppies exhibiting hydrocephalus usually have patchy skull platelets rather than a solid bone, and typically are lethargic and do not grow at the same pace as their siblings. A true case of hydrocephalus can be diagnosed by a veterinarian, though the prognosis is grim.
Chihuahuas are also known for their moleras, a soft spot in their skulls. Chihuahuas are the only breed of dog to be born with an incomplete skull. The molera does fill in with age, but great care needs to be taken during the first six months until the skull is fully formed. Many veterinarians are not familiar with Chihuahuas as a breed, and mistakenly confuse a molera with hydrocephalus. The Chihuahua Club of America has issued a statement regarding this often deadly misdiagnosis [1].
Chihuahuas can also be at risk for hypoglycemia, or low blood sugar. Left unattended, hypoglycemia can lead to coma.
Chihuahuas are also prone to eye infections due to their large, round, protruding eyes and their relatively low ground clearance.
Although figures often vary, as with any breed, the average lifespan for a Chihuahua is approximately 8 to 18 years of age. Chihuahua's are very social dogs and like to meet other dogs, but some are temperamental and aggressive.
[]Nutrition
Chihuahuas are sometimes picky eaters, and care must be taken to provide them with adequate nutrition. At the same time, care must be exercised not to overfeed this tiny breed. Overweight Chihuahuas are prone to joint injuries, tracheal collapse, chronic bronchitis, and shortened life span.
[]"Teacup" and "Deer-faced" Chihuahuas
A deer-faced Chihuahua
The Official A.K.C. Breed Standard describes the Chihuahua as a small dog that comes in two varieties or coat types. The difference in coat type (the Long Coat and the Smooth Coat) is the only official description used to identify a difference within this breed. ALL Chihuahuas are toy dogs.
As with all living things, there will be size variance between individual dogs within this breed. Look within the human family -brothers and sisters will differ in height and in weight, as well as other physical attributes. They are described as humans, male or female, and there is never a need to break the description down further. The same holds true in regard to the Chihuahua.
Unfortunately, the additional adjectives used to describe the size differences and physical appearances are many and have been misused for so long they now seem legitimate. Teacup, Pocket Size, Tiny Toy, Miniature or Standard - are just a few of the many tags and labels that have been attached to this breed over the years. These are breeder-invented terms and may be used to entice prospective buyers into thinking that puppies described in this way are of greater monetary value. They are not and the use of these terms is incorrect and misleading.
Occasionally, within a litter, there may be a puppy that is unusually small ("a runt"). That puppy is a small Chihuahua and any other breakdown in description is not correct. To attach any of these additional labels to any puppy is to misrepresent that Chihuahua and causes a great deal of confusion among potential owners who are looking for a Chihuahua.
No Kennel Club endorses nor condones the use of any of these terms and would caution the perspective puppy buyer not to be misled by them.
It is recognized that many Chihuahua fanciers do want the very small puppy. While they are adorable and can be perfectly healthy, the buyer should be cautioned as to the extra care that may be required with regard to their general health and well-being.[1]
Pepito, Xavier Cugat's chihuahua immortalized in the children's book Pepito the Little Dancing Dog: The Story of Xavier Cugat's Chihuahua.
Godzilla, a South Texas chihuahua that has won many awards in regional dog shows, and is now famous in its statewide commercials.
Coco, pet of Cesar Millan, actor/dog behaviorist of "The Dog Whisperer" on the National Geographic Channel.
Pancho, the "heart-broken" dog of the Fullers in the movie Big Momma's House 2.
Lou, a chihuahua featured on the television show The Soup.
Madame Shirley the Medium is an old-fortune teller chihuahua featured in a TV Show Cartoon, Courage the Cowardly Dog.
PETCO Inc. named Tiger, America's Fastest Chihuahua in the PETCO's Unleashed Fastest Chihuahua Races (The 2006 Unleashed Finals were held in San Diego at PETCO PARK on 9/05/06).
Dino Dobie, Black and Brown chihuahua companion of child actress Hailey Anne Nelson.
