Chihuahuas go under the classification of "toy breeds." They are the smallest breed of dog in the world. They are, in fact, the only "natural" toy breed. That is, they are naturally small and aren't a result of "breeding-down" larger breeds, as were other toy breeds.
Chihuahuas sometimes used to be, and sometimes even today are looked down upon by the unenlightened as being silly little lap dogs of no consequence in canine terms, not real dogs at all. Nothing could be further from the truth, make no mistake a Chihuahua is ALL dog, live with one and you'll discover that fact for yourself! They may be classified in the Toy Group, but they are certainly not toys. Chis are big dogs who happen to be wrapped in a small 'parcel', they generally pay scant regard to their lack of size and are ready to stand up for themselves even if the opposition is far bigger. Sometimes they are too feisty for their own good.
Chihuahuas are comical, entertaining, and loyal little dogs, absolutely brimming with personality -- often a quirky and eccentric personality unmatched by any other breed.
These tiny dogs are certainly unaware of their diminutive stature: they can be bold with other dogs much larger than themselves, and protective of their masters. They are fiercely loyal to their masters and wary of any strangers or new guests introduced into the household, which the Chihuahua considers to be its personal domain.
The Chihuahua needs a great deal of human contact: touching, petting, and general attention. If the Chihuahua does not get this, she or he will use various attention-getting tricks until you give her/him attention. Some owners who have had other, more independent breeds may find the Chihuahua too needy. However, Chis give alot of love and affection in return for your care.
Small, dainty, compact.
Alert little dog; swift-moving with brisk, forceful action and saucy expression.
Gay, spirited and intelligent, neither snappy nor withdrawn.
Head and Skull
Well rounded ‘apple dome’ skull, cheeks and jaws lean, muzzle moderately short, slightly pointed. Definite stop.
Large, round, but not protruding; set well apart; centre of eye is on a plane with lowest point of ear and base of stop; dark or ruby. Light eyes in light colours permissible.
Large, flaring, set on at an angle of approximately 45 degrees; giving breadth between ears. Tipped or broken down highly undesirable.
Jaws strong, with a perfect, regular and complete scissor bite, i.e. upper teeth closely overlapping lower teeth and set square to the jaws.
Slightly arched, medium length.
Shoulders well laid; lean, sloping into slightly broadening support above straight forelegs, set well under chest giving freedom of movement without looseness.
Level back. Body, from point of shoulder to rear point of croup, slightly longer than height at withers. Well sprung ribs, deep brisket.
Muscular; hocks well let down, with good turn of stifle, well apart, turning neither in nor out.
Small and dainty, turning neither in nor out; toes well divided but not spread, pads cushioned, fine, strong, flexible pasterns. Neither hare- nor cat-like, nails moderately short.
Medium length, set high, carried up and over back (sickle tail). When moving never tucked under or curled below the topline. Furry, flattish in appearance, broadening slightly in centre and tapering to point.
Brisk, forceful action, neither high-stepping nor hackney; good reach without slackness in forequarters, good drive in hindquarters. Viewed from front and behind legs should move neither too close nor too wide, with no turning in or out of feet or pasterns. Topline should remain firm and level when moving.
Long Coat: soft texture (never coarse or harsh to touch) either flat or slightly wavy. Never tight and curly. Feathering on ears, feet and legs, pants on hindquarters, large ruff on neck desirable. Tail long and full as a plume.
Smooth Coat: smooth, of soft texture, close and glossy, with undercoat and ruff permissible.
Any colour or mixture of colours but never merle (dapple).
The average height for a chihuahua is between 6-9" high with a Weight: from 2lb up to 2.7 kgs (6 lbs), with 1.8 - 2.7 kgs (4 - 6 lbs) preferred.