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Dog · FCI group 9

Chihuahua

The Chihuahua is a compact toy companion dog originating from Mexico. The breed displays a lively, courageous temperament alongside deep loyalty to its owner. Its small size and alert nature make it well suited to indoor living when given structured guidance.

  • alert
  • lively
  • courageous
  • loyal
  • vocal
Chihuahua
OriginMexico
In MexicoThe most common
Size
Dog
Height at the withers
12.7 to 20.3 cm
Lifespan
7.9 to 16 years

This is general guidance. Always ask your vet.

How long does a Chihuahua live?

A Chihuahua lives 7.9 to 16 years.

Kennel club overviews cite a life expectancy of 14 to 16 years. Large veterinary cohort studies report median and mean lifespans ranging from 7.91 to 11.8 years, with female dogs living longer on average than males.

[S4][S15][S16][S17][S18][S19][S20]

What health problems are common in the Chihuahua?

The most common in the Chihuahua are: Medial Patellar Luxation (MPL), Myxomatous Mitral Valve Disease (MMVD), Collapsing Trachea, Periodontal Disease and Retained Deciduous Teeth, Congenital Hydrocephalus, Juvenile Hypoglycemia.

Between 4 months and 2 years of age

Medial Patellar Luxation (MPL) [S15][S33][S34][S35]

The kneecap slips out of its normal anatomical groove along the thigh bone, causing lameness or skipping steps.

Ask your vet about:

  • OFA Patellar Evaluation
  • Manual orthopedic knee palpation
6 to 8 years of age onward

Myxomatous Mitral Valve Disease (MMVD) [S34][S36][S37][S38]

The heart valve weakens over time and fails to close completely, which can lead to heart murmurs and decreased circulation.

Ask your vet about:

  • Annual cardiac auscultation
  • OFA Cardiac Exam
  • Echocardiography
  • Thoracic radiographs
Between 4 and 8 years of age

Collapsing Trachea [S24][S34]

The cartilaginous rings supporting the windpipe weaken and flatten, triggering coughing spells and breathing difficulties.

Ask your vet about:

  • Airway physical examination
  • Thoracic and cervical radiographs
6 to 9 months for retained teeth; 2 to 3 years for severe periodontitis

Periodontal Disease and Retained Deciduous Teeth [S15][S23][S24]

Baby teeth fail to fall out on time, crowding adult teeth and trapping debris that causes severe gum inflammation.

Ask your vet about:

  • Oral exam under general anesthesia
  • Full-mouth intraoral dental radiographs
Between 1 and 6 months of age

Congenital Hydrocephalus [S34][S39]

Cerebrospinal fluid accumulates abnormally inside the brain cavities, placing pressure on neurological tissue.

Ask your vet about:

  • Cranial ultrasonography through open fontanelle
  • Brain MRI scan
  • Brain CT scan
Between 6 and 16 weeks of age

Juvenile Hypoglycemia [S20][S23][S31][S34][S38]

Blood sugar levels drop dangerously low because small puppies store very limited glycogen in the liver.

Ask your vet about:

  • Handheld blood glucose testing
  • Blood chemistry profile to evaluate liver function

What is a Chihuahua's temperament like?

The Chihuahua is alert, quick, and remarkably brave. It forms deep attachments to its favorite person and acts as a vocal watchdog against unfamiliar sounds.

[S1][S4][S10][S16][S21]

How much exercise does a Chihuahua need?

A Chihuahua needs 20 to 30 minutes of exercise a day.

The breed requires moderate daily exercise satisfied through short leash walks and indoor interactive games. Use a chest harness instead of a neck collar during walks to protect the dog's delicate airway.

  • Energy3 / 5
[S16][S23][S24]

How does a Chihuahua handle heat and cold?

Low body fat reserves and a light coat leave this breed vulnerable to rapid chilling below 7°C, requiring sweaters outside. While it tolerates warm conditions, excessive heat can cause dehydration and hyperthermia due to low blood volume.

  • Handles heat3 / 5
  • Handles cold1 / 5
[S23][S25][S26][S27][S28][S29]

How much does a Chihuahua shed, and how do you groom it?

Brush smooth coats weekly and long coats two to three times per week. Clean the ears regularly and trim nails every 3 to 4 weeks to maintain proper foot posture.

Smooth coat (short, close-lying, glossy) or long coat (soft, flat or wavy with feathering)

  • Shedding3 / 5
[S1][S8][S21][S23][S30][S31]

Is a Chihuahua good with children and other pets?

Chihuahuas fit well into apartment spaces due to their small size, though you must manage their barking. Their fragile bones can sustain serious injuries from rough handling by toddlers or play with large dogs.

  • With children2 / 5
  • With other pets2 / 5
  • In an apartment5 / 5
[S4][S16][S20][S23][S30][S32]

Is a Chihuahua easy to train?

The breed learns well with positive reinforcement using small food treats and brief training sessions. Early socialization between 8 and 16 weeks helps reduce natural wariness toward strangers and other dogs.

  • Ease of training4 / 5
[S4][S23][S30][S32]

What does a Chihuahua eat at each life stage?

  • PuppyOffer a calorie-dense puppy formula designed for small breeds across 3 to 4 scheduled meals per day to maintain stable blood sugar levels.
  • AdultProvide a complete and balanced adult toy-breed diet divided into 2 daily meals, weighing food portions on a kitchen scale to prevent excess weight gain.
  • SeniorSelect a senior formulation with balanced protein to maintain muscle mass and reduced fat content to accommodate a slower metabolic rate.

Where does the Chihuahua come from?

The breed originated in Mexico and takes its name from the state of Chihuahua. It is believed to descend from the Techichi, a small companion dog kept by the Toltec and Aztec civilizations. The American Kennel Club registered its first Chihuahua in 1904, and the FCI granted definitive recognition in 1959.

Country of origin: Mexico.

[S1][S2][S3][S5][S8][S9]

Fun facts about the Chihuahua

  • The Chihuahua holds the official Guinness World Record as the smallest recognized dog breed on Earth. [S1][S22][S47]
  • Puppies are naturally born with an open soft spot in the skull known as a molera, which can remain present through adulthood. [S7][S10][S22]
  • A female Chihuahua named Gidget helped popularize the breed internationally during the late 1990s through restaurant television commercials. [S48]
  • In 2014, large free-roaming packs of Chihuahuas overwhelmed municipal animal services in a neighborhood of Phoenix, Arizona. [S22]

Tips by life stage and weather

  • PuppyFeed your puppy frequent small meals throughout the day to support its high metabolic rate and avoid low blood sugar.
  • PuppyIntroduce your puppy gently to varied sounds, unfamiliar people, and calm animals between 8 and 16 weeks to prevent fear-based defensiveness.
  • AdultWalk your dog using a fitted chest harness instead of attaching the leash to a neck collar to protect its delicate windpipe.
  • AdultWeigh daily food rations on a gram scale and monitor oral health closely to stop tartar buildup and gum disease early.
  • SeniorSchedule regular veterinary checkups that include careful listening to the heart to monitor for emergent heart murmurs.
  • SeniorTrim nails every few weeks to maintain comfortable paw alignment and reduce stress on aging joints.
  • Hot seasonWalk your dog during cooler morning hours and provide shade and water, as small dogs can dehydrate rapidly in strong sun.
  • Hot seasonAvoid leaving your pet in unventilated or warm enclosed spaces, monitoring for signs of heat distress when temperatures rise.
  • Cold seasonDress your Chihuahua in a warm sweater or insulated coat whenever ambient outdoor temperatures drop below 7°C.
  • Cold seasonProvide warm indoor bedding away from floor drafts to stop shivering caused by the breed's minimal body fat.
  • Rainy seasonDry your dog thoroughly with a towel after wet walks to prevent sudden body temperature drops from damp fur.
  • Rainy seasonEngage your dog with indoor interactive play games when heavy storms make outdoor walking cold and hazardous.

In the Kiba Vet app, your pet's breed profile shows a tip of the day based on its age and the weather where you live.

This is general guidance. Always ask your vet.

Checked against sources; veterinary review pending. Updated on September 29, 2026.

Written with the help of AI from the cited sources and checked fact by fact against them by a second model.

Sources

Every health fact and every number on this page comes from these sources. Identifiers from Wikidata (CC0).