Two dog breeds are native to Mexico: the Xoloitzcuintli (pronounced “show-low-eats-QUEENT-lee”) and the Chihuahua. Both have roots stretching back thousands of years to pre-Columbian civilizations, and both are officially recognized by the American Kennel Club. A third ancestor, the Techichi, is now extinct but played a key role in the Chihuahua’s development.
The Xoloitzcuintli: Mexico’s National Dog
The Xoloitzcuintli, often shortened to “Xolo,” is the national dog of Mexico and one of the oldest domesticated breeds on the planet. Archaeological remains have been dated to roughly 5,500 years ago, making the Xolo arguably the first dog of the Americas. European explorers, including Columbus, noted these “strange hairless dogs” in their journals when they arrived in the New World.
Xolos come in three sizes. Toy Xolos stand 10 to 14 inches tall and weigh 10 to 15 pounds. Miniature Xolos measure 14 to 18 inches and weigh 15 to 30 pounds. Standard Xolos reach 18 to 23 inches and can weigh up to 55 pounds. Each size comes in two varieties: hairless and coated. The hairless version has tough, smooth skin that fits close to the body, sometimes with small tufts of hair on the head, feet, and tail. The coated version has a short, flat coat. Both varieties appear in dark colors like black, slate, gray, red, liver, and bronze.
Their build is lean and elegant but surprisingly sturdy. One of the breed’s most distinctive features is its expressive face: a Xolo’s forehead wrinkles when it’s concentrating, giving it an unusually thoughtful look. They’re loyal, alert watchdogs that bond closely with their families.
The Chihuahua: Tiny Dog, Ancient Roots
The Chihuahua is named after the Mexican state of Chihuahua, where Americans first encountered the breed in the mid-1800s. But its lineage goes much further back. The Toltec people of Mexico kept a small, heavy-bodied dog called the Techichi, which had large, Chihuahua-like ears. The Techichi is believed to have been crossbred with the Xoloitzcuintli at some point, eventually producing the modern Chihuahua.
DNA analysis published in the Proceedings of the Royal Society B confirmed this ancient connection. Researchers found that the most common genetic signature in modern Chihuahuas matched a pre-Columbian dog sample from Mexico, a signature found in no other modern breed. This is strong evidence that today’s Chihuahuas descend directly from dogs that lived in Mexico long before European contact, not from dogs brought over by Spanish colonists.
A minority theory suggests the Chihuahua may have arrived from the island of Malta via Spanish conquistadors, but the genetic evidence weighs heavily against this idea.
The Techichi: Mexico’s Extinct Ancestor
The Techichi was a small, sturdy companion kept by the Toltec civilization, which dominated central Mexico from roughly the 10th to 12th centuries. Unlike the modern Chihuahua, the Techichi had a heavier body. It was not a distinct breed in the way we think of breeds today, but rather a type of dog that served as a companion, a food source, and a spiritual figure. When the Aztecs later conquered the Toltecs, they absorbed the Techichi into their own culture. The breed eventually disappeared as a separate line, but its genetic legacy lives on in the Chihuahua.
Sacred Roles in Aztec and Mesoamerican Life
Mexican dogs were far more than pets. In Aztec belief, the Xoloitzcuintli was created by the god Xolotl, whose name forms the first half of the breed’s Nahuatl name (“itzquintli” means dog). According to Aztec creation stories, humans and Xolos were both formed from the same Bone of Life. The dogs were considered a gift to humans: protectors in life, guides in death.
The Aztecs believed most people had to travel through eight levels of the underworld after death, a journey lasting four years. One of the most dangerous obstacles was the Apanohuacalhuia River, which could not be crossed by swimming. Each Xolo would wait at the riverbank for its owner’s spirit, then carry them across on its back. For this reason, dogs were often buried alongside their owners.
On a more practical level, Xolos served as home guardians, hunting partners for turkey and deer, and even living heat packs. Their body temperature runs notably high, so people placed them against sore or aching areas of the body as a remedy. They were also believed to ward off evil spirits and were eaten on ceremonial occasions.
How European Contact Changed Mexican Dogs
When Spanish colonists arrived in the early 1500s, the impact on native dog populations across the Americas was severe. Many indigenous breeds were crossbred with European dogs or simply disappeared. Genetic research shows that this replacement was widespread throughout the continent. Only a handful of breeds in the Americas can credibly claim unbroken pre-Columbian ancestry, and two of them are Mexican: the Chihuahua and the Xoloitzcuintli.
Interestingly, Spanish explorers also documented finding Chinese Crested dogs in Mexico and Central America during the 1500s, which has led to ongoing debate about whether that breed has partial Mexican origins. The connection remains unclear, but it speaks to just how many distinct dog types existed in the region before colonization.
Caring for a Hairless Xolo
If you’re drawn to the Xoloitzcuintli’s unique look, the hairless variety does require some specific care. Without fur as a barrier, their skin is exposed to sun, cold, and irritants. Regular sunscreen application on lighter-skinned Xolos helps prevent burns, and a light jacket in cold weather keeps them comfortable. Their skin is naturally tough and smooth, so they don’t need elaborate skincare routines, but occasional baths help keep pores clear. The coated variety, by contrast, needs only basic brushing.
Both varieties are generally healthy dogs with a long lifespan relative to their size. Their biggest needs are mental stimulation and close human companionship. Xolos that are left alone for long stretches can become anxious or destructive. They tend to bond intensely with one person or family and remain wary of strangers, which is part of what makes them such effective watchdogs.