Breed library

Chihuahua

Also known as Chihuahueño.

Chihuahua photograph.
Chihuahua1 bvdb.jpg - Bonnie van den Born, http://www.bonfoto.nl . The original uploader was Cwazi at Dutch Wikipedia .. CC BY-SA 3.0. Source: https://commons.wikimedia.org/wiki/File:Chihuahua1_bvdb.jpg. License: http://creativecommons.org/licenses/by-sa/3.0/. License: CC BY-SA 3.0.

Breed overview

The Chihuahua or is a Mexican breed of toy dog and the smallest recognized dog breed in the world. It is primarily kept as a companion animal and is characterized by its compact size, large erect ears, and rounded skull. The breed occurs in both short- and long-coated varieties, with a wide range of colors and patterns. Genetic studies indicate that the Chihuahua retains a small proportion of pre-Columbian indigenous American dog ancestry, distinguishing it from most modern breeds, which are largely of European origin. The breed was formally recognized in the early twentieth century and has since become one of the most popular companion dogs worldwide.

  • Country of origin: MexicoBreed reference country of origin.

Breed facts

  • Colonial records refer to small, nearly hairless dogs from the early 19th century; one account claims that 16th-century conquistadores found them plentiful in the region later known as Chihuahua.
  • In a letter written in 1520, Hernan Cortés wrote that the Aztecs raised and sold little dogs as food.
  • The American Kennel Club first registered a Chihuahua in 1904, Midget, owned by H.
  • The Chihuahua or is a Mexican breed of toy dog and the smallest recognized dog breed in the world.
  • The breed occurs in both short- and long-coated varieties, with a wide range of colors and patterns.

Size and appearance

Chihuahua breed standards specify an "apple-shaped" skull, also referred to as an "apple-dome" conformation. Chihuahuas can appear in almost any coat color or pattern, ranging from solid to marked or splashed, meaning the coat has an underlying darker color with scattered lighter patches. Apple-dome Chihuahuas have large, round eyes and large, erect ears, set in a high, dramatically rounded skull. Chihuahuas have a feature on their heads called the molera, which is a soft spot much like the fontanel found in human infants. It can be hard to see but is easy to feel by touch. The stop is well defined, forming a near 90-degree angle where the muzzle meets the skull.

  • Body mass reference: 1 - 3 kgAdult breed reference quantity from the article infobox. Original value 1 - 3 kg. Unit conversion where applicable: 1 inch = 2.54 cm; 1 pound = 0.45359237 kg. Original field and references are retained in the revision-pinned article evidence.
  • Body mass reference: 1.5 kg or moreBreed reference body mass. minimum.
  • Body mass reference: Up to 2.5 kgBreed reference body mass. maximum.
  • Height reference: 8 - 23 cmAdult breed reference quantity from the article infobox. Original value 8 - 23 cm. Unit conversion where applicable: 1 inch = 2.54 cm; 1 pound = 0.45359237 kg. Original field and references are retained in the revision-pinned article evidence.
  • Coat length: short
  • Coat length: long
  • Coat texture: smooth
  • Height category: short
  • Weight category: toy

Personality and behavior

Care planning: record what your dog enjoys, how they greet visitors, and how they respond to new places. Add notes after walks and training so you can see their habits over time. Where this profile includes behavior research, use the same named measures when comparing your shortlist.

  • Attachment and attention seeking (C-BARQ mean): 2.40 / 4Owner-reported attachment and attention seeking factor mean for US reference population Chihuahua.
  • Chasing (C-BARQ mean): 1.59 / 4Owner-reported chasing factor mean for US reference population Chihuahua.
  • Dog-directed aggression (C-BARQ mean): 1.35 / 4Owner-reported dog-directed aggression factor mean for US reference population Chihuahua.
  • Dog-directed fear (C-BARQ mean): 1.28 / 4Owner-reported dog-directed fear factor mean for US reference population Chihuahua.
  • Energy (C-BARQ mean): 1.71 / 4Owner-reported energy factor mean for US reference population Chihuahua.
  • Excitability (C-BARQ mean): 2.09 / 4Owner-reported excitability factor mean for US reference population Chihuahua.
  • Familiar-dog aggression (C-BARQ mean): 0.87 / 4Owner-reported familiar-dog aggression factor mean for US reference population Chihuahua.
  • Non-social fear (C-BARQ mean): 1.03 / 4Owner-reported non-social fear factor mean for US reference population Chihuahua.
  • Owner-directed aggression (C-BARQ mean): 0.31 / 4Owner-reported owner-directed aggression factor mean for US reference population Chihuahua.
  • Separation-related problems (C-BARQ mean): 0.81 / 4Owner-reported separation-related problems factor mean for US reference population Chihuahua.
  • Stranger-directed aggression (C-BARQ mean): 1.00 / 4Owner-reported stranger-directed aggression factor mean for US reference population Chihuahua.
  • Stranger-directed fear (C-BARQ mean): 1.28 / 4Owner-reported stranger-directed fear factor mean for US reference population Chihuahua.
  • Touch sensitivity (C-BARQ mean): 1.22 / 4Owner-reported touch sensitivity factor mean for US reference population Chihuahua.
  • Trainability (C-BARQ mean): 2.24 / 4Owner-reported trainability factor mean for US reference population Chihuahua.

Exercise and activities

Care planning: build a weekly routine with walks, play and time to explore. Enter the minutes and sessions that work for your dog, then compare the weekly total with your available time. Keep notes about the activities your dog enjoys and adjust the routine together.

Training and enrichment

Care planning: choose one everyday skill to practice and keep a record of each session. Note the cue, the reward your dog enjoys and what went well. Rotate familiar games and new activities, and use your notes to choose the next small step.

Coat and grooming

Care planning: use the coat details above to discuss a grooming routine with your groomer. Record brushing sessions, baths and appointments in the app. Add the tools you use and your preferred schedule so the whole household can follow the same routine.

  • Coat length: short
  • Coat length: long
  • Coat texture: smooth

Health and lifespan

Care planning: keep your dog's veterinary records, health-check dates and agreed care plan together. Add reminders for appointments and record changes you want to discuss at the next visit. Use the linked breed organizations and original references to explore their current health resources.

Living with this breed

Care planning: compare this profile's adult dimensions, coat care and available activity information with your household's routine. Make a shortlist, plan who will handle daily care and save the questions you want to ask a breed club, rescue or breeder.

Compare breeds

Compare supported adult height and weight ranges, matching research measures and sourced coat and care categories.

Add Chihuahua to a comparison

Breed history

DNA studies suggest that native American dogs entered North America from Siberia approximately 10,000 years ago and were subsequently isolated from other breeds for approximately 9,000 years until the arrival of the first Europeans; these pre-contact dogs exhibited a unique genetic signature that is now nearly extinct. A study based on sequencing of ancient dog genomes, published in 2020, suggests that this pre-colonial ancestry survives in two Mexican breeds, to the extent of about 4% in the Chihuahua (and some 3% in the Xoloitzcuintli). An earlier study (2013) had suggested that the pre-colonial ancestry of the Chihuahua might be as high as 70%. Colonial records refer to small, nearly hairless dogs from the early 19th century; one account claims that 16th-century conquistadores found them plentiful in the region later known as Chihuahua. In a letter written in 1520, Hernan Cortés wrote that the Aztecs raised and sold little dogs as food.

Clubs and further reading

Sources

  1. Chihuahua (dog breed) - WikipediaWikipedia contributors Retrieved 2026-10-14.License: CC BY-SA 4.0. Adapted excerpts from Wikipedia contributors, Chihuahua (dog breed), revision 1379853560. CC BY-SA 4.0. Formatting, citations and selection changed. Source history: https://en.wikipedia.org/w/index.php?title=Chihuahua_%28dog_breed%29&action=history
  2. Wikidata structured breed dataWikimedia contributors Retrieved 2026-10-14.License: CC0 1.0. Wikidata contributors (CC0).
  3. National C-BARQ breed and all-breed means from USA.PLOS ONE / Figshare Retrieved 2026-10-14.License: CC BY 4.0. Bohland, Kyle R.; Lilly, Meghan Leanne; Herron, Meghan E.; Arruda, Andréia G.; O’Quin, Jeanette M. (2023). National C-BARQ breed and all-breed means from USA.. PLOS ONE. Dataset. https://doi.org/10.1371/journal.pone.0289356.s003 CC BY 4.0. Selected rows and field names adapted; values unchanged.
  4. File:Chihuahua1 bvdb.jpgWikimedia Commons Retrieved 2026-10-14.License: CC BY-SA 3.0. Chihuahua1 bvdb.jpg - Bonnie van den Born, http://www.bonfoto.nl . The original uploader was Cwazi at Dutch Wikipedia .. CC BY-SA 3.0. Source: https://commons.wikimedia.org/wiki/File:Chihuahua1_bvdb.jpg. License: http://creativecommons.org/licenses/by-sa/3.0/.
  5. Palipaws everyday care planningPalipaws Retrieved 2026-10-14.License: Palipaws original factual summaries. Palipaws. Original care-planning text, separate from breed measurements and licensed article summaries.
  6. AKC national parent club directoryAmerican Kennel Club Retrieved 2026-10-14.License: Factual reference only. Names and verified external links only. No source descriptions, logos or endorsement reused.