Chihuahua

Companion & toy

Toy

Median 11.8 y

FCI group 9 · Companion and Toy Dogs · Derived from the adult weight midpoint (2 kg)

Median survival across 14,636 UK dogs (VetCompass, McMillan 2024) · half live 9–14 y

The Chihuahua or Chihuahueño 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.

Charming

Sassy

Devoted

Summary from Wikipedia (CC BY-SA) · reference ranges from the Kintail breed dataset

Adult weight

Reference

Male

1–3 kg

Female

1–3 kg

Breed club figure (the American Kennel Club)

Varieties

Reference

Smooth Coat

Toy build

1–3 kg

12.7–20.3 cm

FCI 218 recognises two coat varieties, judged separately and interbred freely; same size as the parent — coat only; one range for both sexes

Long Coat

Toy build

1–3 kg

12.7–20.3 cm

FCI 218 recognises two coat varieties, judged separately and interbred freely; same size as the parent — coat only; one range for both sexes

FCI 218 divides this breed by coat and face. The varieties are the same size — the coat is the only difference.

Weight for age

Stock data

Male

Female

Expected range

Expected range from the breed's own adult weight, kilograms. Growth reference: Salt et al. 2017, WALTHAM (under 6.5 kg band).

Heat cycles · females

Stock data

First heat

8–12 mo

typical

Interval

180 d

typical

Bleeding

~9 d

typical

Proestrus 9d

Estrus 9d

Diestrus 52d

Anestrus 110d

General figures for dogs, not for this breed — individual cycles vary widely.

Questions people ask

Adult males usually weigh 1–3 kg and females 1–3 kg. Most are close to their full size by around 19 months, though the last little bit of filling out takes longer. Growth reference: Salt et al. 2017, WALTHAM (under 6.5 kg band).

No Chihuahua cycle figures are published here yet, so this is general guidance rather than a breed number: most females have a first season somewhere between six and fifteen months, and cycles then settle to roughly every 180 days. Smaller breeds tend to start earlier and larger ones later.

The median is 11.8 y. Median survival across 14,636 UK dogs (VetCompass, McMillan 2024) · half live 9–14 y. How the later years go comes down to weight, teeth, exercise and regular check-ups far more than to the breed.