Chihuahua Breed Guide: Size, Temperament, Lifespan and Adoption
What were Chihuahuas bred for, and where do they come from?
AKC places the Chihuahua in the Toy Group and lists the Mexican State of Chihuahua as its origin. The earliest history of the breed is uncertain, since the Toltecs and Aztecs kept dogs for food, religious purposes and companionship, and it is not known whether those dogs were Chihuahuas. One theory traces the breed to the Techichi of Central and South America, while another points to small Chinese dogs brought to Central America by Spanish traders. UKC describes the Chihuahua today as a popular companion dog.
Written records of the breed start in 1850, when three tiny dogs were carried to the United States from Chihuahua, Mexico. The AKC recognized the breed in 1904, and the United Kennel Club followed in 1948.
How big are Chihuahuas among small dog breeds?
AKC lists the Chihuahua as an extra-small breed, published at 5-8 inches tall and not exceeding 6 pounds. The UKC standard describes an ideal weight of 3 to 6½ pounds, with smaller dogs acceptable. The breed comes in smooth and long coats and in many colors.
What is the Chihuahua temperament, and why are some Chihuahuas aggressive?
AKC describes the breed's temperament as charming, graceful and sassy. Many Chihuahuas are devoted lap dogs and playful companions, and they tend to be one-person or one-family dogs. They are often reserved toward strangers, so early socialization so that the dog accepts new people is important. UKC describes them as courageous little watchdogs willing to defend their territory against strange people and dogs. They can foolishly challenge larger strange dogs, and some are overly bold while others are overly timid.
Children are often fairly playful with a Chihuahua, yet adults need to watch them closely, since a child could easily injure a dog this small.
How much exercise does a Chihuahua need?
Many of the breed's physical exercise needs can be met with indoor games, but it still needs the mental stimulation of walking and sniffing outdoors. Dog parks are generally not a good idea unless only small dogs share the space. Chihuahuas tend to dislike the cold because their small size lets them lose body heat rapidly.
How much grooming does a Chihuahua need?
Brushing once a week will remove dead hair. Regular tooth brushing helps prevent the periodontal problems to which the breed is prone.
Is a Chihuahua easy to train?
Chihuahuas learn quickly but tend to have a stubborn streak. They respond poorly to force-based methods but do very well with food-based rewards. Housetraining can be more challenging than with many other breeds, though many Chihuahuas can learn to use indoor potty systems.
How long do Chihuahuas live, and what health issues come up?
For the Chihuahua dog lifespan, AKC gives a general life expectancy of 14-16 years. The breed tends to become obese, so owners may need to cut back calories if weight starts to climb. Very small puppies are prone to hypoglycemia, which frequent small meals may help guard against.
Thinking about adopting a Chihuahua?
If you plan to adopt a Chihuahua, look for a dog whose people can tell you how it handles strangers, since the breed is often reserved with new people. Ask about the dog's history with children, because supervision matters around such a small dog.
AKC breed facts
These are the American Kennel Club’s general facts and 1 to 5 ratings for the Chihuahua as a breed. General tendencies don’t establish any one dog’s ancestry, personality or health; ask the listing organization about the dog you are considering.
- AKC group
- Toy Group
- AKC recognition year
- 1904
- Height (AKC published)
- 5-8 inches
- Weight (AKC published)
- not exceeding 6 pounds
- General life expectancy
- 14-16 years
- AKC size category
- XSmall
AKC general breed ratings (1 to 5)
- Energy: 4 of 5
- Mental enrichment: 3 of 5
- Trainability: 3 of 5
- Grooming frequency: 1 of 5
- Shedding: 2 of 5
- Vocalization: 5 of 5
- Drooling: 1 of 5
- Adaptability: 4 of 5
- Playfulness: 4 of 5
- Watchful or protective tendency: 4 of 5
- Affection toward family: 4 of 5
- Openness toward strangers: 2 of 5
- AKC child compatibility rating: 1 of 5
- AKC dog compatibility rating: 3 of 5
Health screenings AKC lists for the breed
Breeding evaluations AKC names for the breed; they are not a diagnosis or a testing plan for any one dog.
- Patella Evaluation
- Cardiac Exam
- Ophthalmologist Evaluation
Source: American Kennel Club breed profile (opens in a new tab), retrieved November 4, 2026 (snapshot akc-2026-11-04).
Written by Lily's Second Chance with AI assistance from the sources listed under References. Facts were checked automatically against those sources on November 7, 2026.
References
- Chihuahua Smooth Coat | VCA Animal Hospitals (opens in a new tab), VCA Animal Hospitals, checked November 7, 2026
- Breed Standards : Chihuahua | United Kennel Club (UKC) (opens in a new tab), United Kennel Club, checked November 7, 2026
- Chihuahua - AKC breed profile (snapshot akc-2026-11-04) (opens in a new tab), American Kennel Club, checked November 4, 2026
