The Chihuahua is regarded as the smallest pedigree dog in the world and carries the name of the largest state of the Mexican Republic (Chihuahua). One assumes that these dogs used to live in the wild and, at the time of the Toltec civilization, were captured and domesticated by the natives. Representations of a Toy dog called « Techichi » which lived in Tula, were used as decorations on town architecture. These statues are very similar to the present day Chihuahua.
GENERAL APPEARANCE
This dog has a compact body. Of great importance is the fact that his skull is apple-shaped and that he carries his moderately long tail very high, either curved or forming the shape of a semicircle with the tip pointing towards the loin region.
IMPORTANT PROPORTIONS
Length of body slightly greater than height at withers. Desired, however, is an almost square body, especially in males. In bitches, because of the function of reproduction, a slightly longer body is permitted.
BEHAVIOUR / TEMPERAMENT
Quick, alert, lively and very courageous.

HEAD

Skull

Well rounded apple head ( a characteristic of the breed) preferably without a fontanel although a small one is allowed.
Stop
Well marked, deep and broad as the forehead is rounded above the set-on of muzzle.
Nose
Any colour permitted. Moderately short, pointing slightly upwards.
Muzzle
Short, straight seen from side, broad at set-on, tapering towards the tip.
Lips
Lean and close fitting.
Cheeks
Only slightly developed, very clean.
Jaw / Teeth

Scissor or pincer bite. Overshot, undershot, as well as any other anomaly in position of upper or lower jaw must be strictly penalized.
Eyes

Large, roundish in shape, very expressive, not protruding, perfectly dark. Light eyes permissible, but not desired.
Ears

Large, upright, widely open, broad at set-on, gradually tapering towards their slightly rounded tip. In repose inclined laterally forming an angle of 45°.

NECK

Upper profile
slightly arched.
Length
Medium length
Shape
Thicker in dogs than in bitches
Skin
Without dewlap. In the long-haired variety, the presence of a neck-ruff with longer hair is highly desirable.

BODY - compact and well built

Topline
Level
Whiters
Only slightly marked
Back
Short and firm
Loin
Strongly muscled
Croup
Broad and strong; almost flat or slightly sloping
Chest

Ribcage broad and deep, ribs well sprung. Seen from front, roomy but not exaggerated. Seen from side, reaching to elbows. Not barrel shaped
Underline and belly
Formed by a clearly tucked up belly. Slack belly is permitted but not desired

TAIL

Set on high, flat in appearance, of moderate length; broad at root, tapering gradually towards the tip. Tail carriage is an important characteristic of the breed : when the dog is moving it is carried either high in a curve or in a semicircle with tip towards the loin region, which gives balance to the body, it should never be carried between the hindlegs nor curled below the backline. The hair on the tail depends on the variety and is in harmony with the body coat. In the long haired variety, the tail coat forms a plume. Tail is pendant in repose and forms a slight hook.

LIMBS

Forequarters

Forelegs straight and of good length; seen from the front, they form a straight line with the elbows. Seen from the side, they are upright.
Shoulders
Clean and moderately muscled. Good angulation between shoulder-blade and upper arm
Elbows
Firm and fitting close to body which ensures free movement.
Pasterns
Slightly sloping, strong and flexible
Forefeet

Very small and oval with toes well apart but not splayed (neither hare- nor cat-foot). Nails particularly well arched and moderately long. Pads well developed and very elastic. Dewclaws are not desirable.
Hindquarters

Hindlegs well muscled with long bones, vertical and parallel to each other with good angulation at hip, knee and hock joints, in harmony with angulation of forequarters.
Hocks
Short with well developed Achilles’ tendons; seen from rear, they are well apart straight and vertical.
Hindfeet


Very small and oval with toes well apart but not splayed (neither hare- nor cat-foot). Nails particularly well arched and moderately long. Pads well developed and very elastic. Dewclaws are not desirable.
Gait / Movement



Steps are long, springy, energetic and active with good reach and drive. Seen from rear, hind legs should move almost parallel to each other, so that the foot prints of the hind feet fit directly into those of the front feet. With increasing speed, the limbs show a tendency to converge towards the centre point of gravity (single track). Movement remains free and springy without visible effort, head raised and back firm.
Skin
Smooth and elastic all over body

COAT

Hair
In this breed there are two varieties of coat
Short haired


Coat is short, lying close all over body. If there is an undercoat, the hair is somewhat longer; sparse coat on throat and belly permissible; slightly longer on neck and tail, short on face and ears. Coat is glossy and its texture is soft. Hairless dogs are not tolerated.
Long Haired


Coat should be fine and silky, smooth or slightly wavy. Not too thick undercoat desired. Coat is longer, forming feathering on ears, neck, rear of front and hind legs, on feet and on tail. Dogs with long billowing coat will not be accepted.
Color
All colors in all possible shades and combinations are admitted, except merle colour.

WEIGHT

In this breed only the weight is taken into consideration, not the height. Ideal weight : between 1.5 and 3 kg. However, dogs between 500 gr and 1.5 kg are accepted. Subjects weighing less than 500 gr and more than 3 kg shall be disqualified.

FAULTS

Any departure from the foregoing points should be considered a fault and the seriousness with which the fault should be regarded should be in exact proportion to its degree.
- Missing teeth
- Double teeth (persistence of temporary teeth)
- Deformed jaws
- Pointed ears
- Short neck
- Long body
- Roach or hollow back (Lordosis or Kyphosis)
- Steep croup
- Narrow chest, flat ribcage
- Tail: incorrect set-on, short or twisted
- Short limbs
- Out at elbow
- Too close behind

SEVERE FAULTS

- Narrow skull
- Eyes small, deep set or protruding
- Long muzzle
- Under or overshot mouth
- Patella luxation
- Unstable stiffles

ELIMINATING FAULTS

- Aggressive or overly shy
- Deer type dogs (dogs with an atypical or extreme stylized structure: refined head, long neck, slender body, long limbs)
- Dogs with a large fontanel
- Drop ear or short ear
- Deformed jaws
- Extremely long body
- Absence of tail
- In the long-haired variety: dogs with very long, fine and billowing coat
- In the smooth-haired variety: bald patch (alopecia)
- Merle color
- Subjects weighing less than 500 gr and more than 3 kg

Any dog clearly showing physical or behavioural abnormalities shall be disqualified.

N.B. : Male animals should have two apparently normal testicles fully descended into the scrotum.