September 8, 2026
The Xoloitzcuintli — also known as the Xolo, Xoloitzcuintle, or Mexican Hairless Dog — is one of the most fascinating dog breeds in the world.
Its history is not simply the history of a modern kennel breed.
It is a story that connects archaeology, Indigenous cultures, Mesoamerican religion, mythology, ancient trade routes, colonial history, genetics, modern conservation and international dog breeding.
For thousands of years, dogs resembling the Xoloitzcuintli lived alongside the peoples of what is now Mexico and other parts of Mesoamerica. They were companions, ritual animals, symbols, sources of warmth, and, in some historical contexts, food animals. Their images appear in ancient ceramics, sculptures and manuscripts.
The breed later came dangerously close to disappearing.
In the twentieth century, a small number of surviving dogs became the foundation of a remarkable rescue effort. The most important moment in that process was the 1954 Xolo Expedition, led by British researcher and cynologist Norman Pelham Wright.
From those efforts emerged the modern recognised Xoloitzcuintli.
Today, the breed is recognised internationally and can be found not only in Mexico but also across North America, Europe and other parts of the world.
But the modern Xolo is also a reminder that the word “ancient breed” needs to be understood carefully. The breed's cultural and archaeological history is ancient, while the modern concept of a formally standardised pedigree breed is much more recent.
This article brings those two histories together.
The Xoloitzcuintli is an indigenous Mexican dog breed recognised by the Fédération Cynologique Internationale (FCI) as FCI Standard No. 234, Group 5, Section 6 — Primitive Type.
The breed exists in hairless and coated varieties and in three size varieties.
The FCI standard describes Mexico as the breed's country of origin and places the Xolo among the primitive-type dogs.
The name itself comes from Nahuatl and is traditionally connected with Xolotl, the canine-associated deity, and itzcuintli, meaning dog.
The name therefore carries a direct connection between the modern breed and the religious and cultural world of ancient central Mexico.
The Xoloitzcuintli is frequently described as one of the oldest dog breeds in the Americas.
Archaeological evidence shows that dogs with characteristics associated with the Mexican Hairless Dog existed in Mesoamerica thousands of years ago.
However, there is an important distinction between an ancient dog population and a modern pedigree breed.
The archaeological record demonstrates the antiquity of hairless or hairless-like dogs in Mesoamerica. It does not mean that every modern Xolo can be traced through an uninterrupted pedigree to a particular dog living 3,000 or 4,000 years ago.
Modern breed formation and formal breed standards are relatively recent phenomena.
This distinction is important because modern genetic research has shown that most modern American dog populations were profoundly transformed after European colonisation.
The cultural history of the Xolo is therefore much older than the modern pedigree system.
The deeper history of the Xolo begins before Mexico existed as a modern nation.
Dogs entered the Americas with human populations migrating from Asia. Large-scale ancient-DNA research has shown that pre-contact American dogs formed a distinct lineage that was associated with human movements into the Americas. After European arrival, most of these ancient American dog lineages almost completely disappeared.
This is one of the most important discoveries for understanding the Xolo.
The Xolo is not simply an isolated “dog that appeared in Mexico.”
It belongs to the much larger story of dogs moving with humans across the American continent.
Over thousands of years, these dogs became part of different Indigenous societies and developed different physical types.
In Mesoamerica, one of the most distinctive of those types was the hairless dog.
Some of the most famous archaeological evidence comes from western Mexico.
The ancient cultures of the Colima region produced extraordinary ceramic dog figures, many of which are now known as Colima Dogs.
These vessels and sculptures show dogs in different positions:
Archaeological research has demonstrated that dogs played an important role in Mesoamerican societies and that different dog types existed.
The archaeological record includes the ordinary dog, the short-legged tlalchichi, and the hairless xoloitzcuintli.
The Instituto Nacional de Antropología e Historia and Mexican archaeological scholarship have used a combination of historical documents, ceramic representations, skeletal remains and, increasingly, molecular evidence to investigate these ancient dogs.
One important specialist work is Carolyn Baus de Czitrom's Los perros de la antigua provincia de Colima, published by Mexico's Instituto Nacional de Antropología e Historia in 1988. The book catalogues and studies ceramic dog representations from ancient Colima.
The Xolo was not merely an animal living beside humans.
In many Mesoamerican traditions, dogs had a profound symbolic and religious role.
The most important figure connected with the Xolo is Xolotl.
Xolotl was a complex deity associated with death, transformation, the evening star, fire, lightning and the journey between different states of existence.
The dog was therefore connected with one of the most important ideas in Mesoamerican religion:
the journey between life and death.
According to Aztec/Mexica traditions, the dead had to travel through the dangerous realm of Mictlan.
Dogs were believed to help guide their human companions through this journey.
In one widely preserved tradition, the dead eventually had to cross a body of water, and a dog could help its former owner reach the other side.
This explains why dogs could have extraordinary funerary significance.
The Xolo was therefore not simply “a dog associated with death.”
It was connected with the idea of a guide.
The dog accompanied the human being during life and, symbolically, could continue to accompany that person after death.
The American Kennel Club's historical overview describes this role and notes that dogs could be killed and buried or burned with their owners so that they would be available for the journey into the afterlife.
Archaeological evidence shows that dogs were deliberately placed in funerary contexts throughout parts of ancient Mesoamerica.
In western Mexico, dog burials and ceramic dog effigies became particularly prominent.
Research into ancient Mexican dogs shows that dogs were not all used in exactly the same way. Different types had different roles and meanings, and the archaeological context matters.
This is why it is too simplistic to say:
“The Aztecs buried Xolos with every dead person.”
The historical reality was more complicated.
Dogs were used differently by different societies, in different periods and for different purposes.
Some were associated with funerary practices.
Some were companions.
Some were associated with food.
Some were connected with ritual.
And some were simply domestic animals.
The Xolo's religious significance is reflected in its connection with Xolotl.
The FCI standard itself preserves this historical tradition, stating that the Xolo was regarded as a representation of the god Xolotl and that its meat was used in special ceremonies in pre-Hispanic Mexico.
Modern interpretations, however, need to distinguish between historical evidence and later romanticised stories.
The Xolo was undoubtedly important in Mesoamerican culture.
But the precise meaning of that importance changed between cultures and historical periods.
One of the most persistent traditions surrounding the Mexican Hairless Dog is its association with warmth and healing.
A hairless dog's body feels unusually warm to the human hand because there is no thick coat separating the skin from the environment.
Historical traditions therefore associated Xolos with therapeutic warmth.
They were reportedly placed close to people suffering from pain or illness.
In modern language, the Xolo was sometimes described almost as a living hot-water bottle.
The tradition is also reflected in the historical material collected in your book, where the heat of the Xolo's body is described as having been used to relieve pain such as rheumatism.
It is important, however, to distinguish cultural belief from modern medical evidence.
There is no scientific basis for claiming that a Xolo can diagnose or cure disease simply by lying next to a person.
The historical importance is that people believed the dog could help.
One of the most important documentary sources for the history of the Xoloitzcuintli is the Florentine Codex, compiled under the direction of Franciscan friar Bernardino de Sahagún in the sixteenth century.
The Florentine Codex is a twelve-book encyclopedic record of Indigenous life and knowledge in central Mexico.
Book XI is particularly important because it deals with natural things, including animals.
The Library of Congress describes it as one of the major historical sources for understanding the natural world and Indigenous knowledge of central Mexico. It specifically identifies the Xoloitzcuintli among the animals raised by the people of the region.
The digital edition of the Florentine Codex preserves a remarkable description of the Xoloitzcuintli.
On Book XI, folio 17r, Sahagún's text describes dogs called xoloitzcuintli as having essentially no hair and says that they were covered with blankets at night.
The manuscript also records a historical explanation that some people believed the dogs became hairless after being treated with a resin called óxitl, while others said that naturally hairless dogs were born in particular towns.
This is fascinating because the historical account contains two different explanations for hairlessness.
Modern genetics gives us a completely different explanation.
The hairless phenotype is associated with a mutation in FOXI3, not with resin removing the hair genetically.
The Florentine Codex therefore provides an extraordinary example of how people in the sixteenth century understood the animal they lived with — while modern science gives us the biological explanation.
Another important Mesoamerican manuscript associated with the mythology surrounding the Xolo is the Codex Fejérváry-Mayer.
It is not simply a “Xolo breed book.”
Rather, it is a pre-Hispanic Mesoamerican manuscript containing complex calendrical and religious imagery.
Xolotl appears in Mesoamerican manuscripts and artistic traditions in canine or dog-associated form.
Specialist iconographic research has demonstrated connections between representations of Xolotl and the dog day-sign Itzcuintli.
The Fejérváry-Mayer is especially important in the study of this iconography.
This distinction matters:
Xolotl is a deity. Xoloitzcuintli is a dog.
The two became deeply connected in Mesoamerican religious thought, but they should not be treated as exactly the same thing.
The dog appears across a much wider artistic world than one manuscript.
Xolo- or dog-associated imagery can be found in:
Research into ancient Mexican dog imagery has identified different dog morphologies and has shown that the ancient population was not represented by a single uniform type.
The Xolo therefore belongs to a much larger visual language of dogs in Mesoamerica.
One of the most fascinating scholarly questions concerns the geographical distribution of hairless dogs.
A 2016 study by Patricia Carot and Marie-Areti Hers, “De perros pelones, buzos y Spondylus. Una historia continental,” examined the relationship between hairless dogs, long-distance exchange networks and connections between Mesoamerica and the Andean world.
The authors discuss archaeological evidence from Mexico and South America and propose that human movements and long-distance exchange may have contributed to the continental distribution of hairless dogs.
They are particularly interested in the connection between hairless dogs and Spondylus, a highly valued marine shell that circulated over very long distances.
This is an important hypothesis, but it should be presented as a scholarly interpretation rather than as a settled fact.
The ancient distribution of hairless dogs is still being investigated.
The arrival of Europeans radically changed the history of Indigenous American dogs.
European dogs entered the Americas in large numbers.
They brought new genetic populations into contact with Indigenous dogs.
At the same time, colonial society disrupted Indigenous cultural practices.
The Xolo lost much of the cultural environment that had supported it for centuries.
Its population declined dramatically.
Your book describes this period simply: after Spanish colonisation, the number of Xolos decreased sharply, eventually leaving very few typical Aboriginal dogs in Mexico.
Modern genetic research confirms that the transformation was profound.
Ancient-DNA research shows that pre-contact American dog lineages almost completely disappeared following European colonisation.
This is one of the most surprising discoveries in modern Xolo history.
The modern Xolo looks like an ancient Mexican dog.
But its genome tells a more complicated story.
A major 2020 study of prehistoric dog genomes found that modern European-derived ancestry dominates most modern dog populations worldwide. Nevertheless, the Xoloitzcuintli retains an estimated approximately 3% pre-colonial ancestry.
This does not mean that the Xolo is only 3% ancient.
It means that, in the particular ancestry model used by the study, approximately 3% of the modern Xolo genome could be assigned to pre-colonial Native American dog ancestry.
That distinction is critical.
The Xolo's ancient identity is therefore partly cultural, partly archaeological and partly genetic — and these three histories do not overlap perfectly.
This is one of the most important points in understanding Xoloitzcuintli history.
Ancient Mesoamerican people did not have “FCI breeds.”
They had dogs.
They selected dogs, bred dogs, valued certain physical characteristics and developed different local populations.
The modern concept of a dog breed involves:
That system developed much later.
Therefore, it is more scientifically accurate to say:
The Xoloitzcuintli has an ancient cultural and biological history, while the modern pedigree breed was formalised in the twentieth century.
By the nineteenth century, genuinely indigenous hairless dogs had become increasingly rare.
Some Xolos nevertheless reached the United States and appeared in early dog-show and registration records.
The American Kennel Club records a Mexican dog called “Mee Too” as an early Xolo registered in 1887. Another famous dog, Chinito Junior, became an AKC champion in 1940.
This is a remarkable part of the breed's history.
The Xolo was internationally visible before the modern rescue programme had even begun.
But visibility did not mean security.
The breed remained extremely rare.
The Mexican Revolution of 1910 was followed by a broader revival of interest in Indigenous Mexican identity and culture.
The Xolo became part of that cultural rediscovery.
Artists Frida Kahlo and Diego Rivera were famously associated with Xolos, helping transform the dog into a powerful symbol of Mexican identity.
The breed was no longer seen only as an unusual ancient dog.
It increasingly became a symbol of Mexico itself.
This cultural revival helped create the environment in which serious conservation of the breed became possible.
By the middle of the twentieth century, the Xoloitzcuintli was in a dangerous position.
The breed had survived thousands of years, but modernisation, crossbreeding, cultural change and population decline had left very few dogs that could confidently be considered representative of the traditional type.
In 1954, the decisive expedition took place.
It became known as the Xolo Expedition.
The expedition was led by Norman Pelham Wright, a British researcher and cynologist who had spent years studying the Xolo.
Your book identifies 1954 as the key rescue expedition and records that its purpose was to find dogs preserving the authentic breed type in remote parts of Mexico. Ten dogs were selected — six females and four males — and these dogs became the foundation of the modern recovery programme.
Later historical accounts describe the expedition as involving several journeys through remote areas, including Guerrero and Michoacán. The team included Mexican and British dog authorities and people associated with the international promotion of the breed.
The expedition did not simply “find ten cute dogs.”
It was a conservation effort.
The people involved were searching for surviving dogs that could preserve the traditional morphology and genetic foundation of the breed.
The dogs located during the expedition became the foundation of a formal breeding and registration programme.
A breed that had survived for thousands of years had reached a point where its survival depended on deliberate human intervention.
That is one of the great paradoxes of the Xolo:
The breed survived because it was once able to survive without modern breeding systems.
But by the twentieth century, it needed a breeding system to survive.
Norman Pelham Wright later documented his work in the book El enigma del xoloitzcuintli.
The book was published in Mexico in 1960 by the Instituto Nacional de Antropología e Historia and is approximately 102 pages long.
It is one of the most important historical works devoted specifically to the Xoloitzcuintli and the breed's modern rediscovery.
Your own book also identifies Wright's El enigma del xoloitzcuintli as one of the foundational works associated with the breed's twentieth-century revival.
For anyone seriously studying Xoloitzcuintli history, this is one of the books that belongs on the reading list.
The work following the expedition led to the creation of an official breed standard.
Your book records May 1, 1956 as the date on which the Xoloitzcuintli was officially recognised in Mexico.
The Xoloitzcuintli therefore entered a new historical phase.
For thousands of years, the dog had existed as an Indigenous animal population.
Now it became a formally described breed.
The next major milestone was international recognition.
The Xoloitzcuintli received definitive FCI recognition in 1961 and became FCI Standard No. 234.
Today it remains classified in Group 5, Section 6, Primitive Type.
This was an enormous step.
The breed was no longer only a Mexican cultural treasure.
It became part of an international pedigree and dog-show system.
The modern FCI standard recognises:
The standard also explicitly recognises the genetic importance of the coated variety.
Coated Xolos are not a separate breed.
They are part of the genetic structure of the Xoloitzcuintli.
The current FCI standard allows appropriately constructed coated Xolos to contribute to genetic diversity under specific breeding conditions.
Modern genetics provides a remarkable explanation.
The hairless phenotype is associated with a mutation in FOXI3, a gene involved in ectodermal development.
A 2008 paper published in Science identified a frameshift mutation in FOXI3 associated with canine ectodermal dysplasia in hairless dogs.
The same biological mechanism affects hair and teeth.
This explains why hairless Xolos often have fewer or differently shaped teeth.
A later study of historical hairless-dog skeletal material found the same FOXI3 variant and documented its association with the characteristic dental phenotype.
This is one of the clearest examples of modern genetics helping us understand a characteristic that humans have observed in Xolos for centuries.
It is tempting to think of the hairless Xolo as the “real” Xolo and the coated dog as something secondary.
Genetically and historically, that is incorrect.
The coated variety is an integral part of the breed.
The FCI standard specifically recognises its role in maintaining genetic diversity.
The existence of coated puppies is also biologically connected to the inheritance of hairlessness.
This is one reason why the modern breeding system cannot be understood simply as “breeding hairless dogs together.”
The genetics of the breed are much more interesting than that.
The Xolo has been studied from several completely different scientific perspectives.
Archaeologists study:
A particularly important archaeological study is:
Manin et al. (2018), “Can we identify the Mexican hairless dog in the archaeological record?”
The researchers examined eight archaeological dog mandibles from Tizayuca in the Basin of Mexico. The dogs were dated between approximately 1,620 and 370 years before present. Four mitochondrial haplotypes were identified, including two previously unknown haplotypes. Some haplotypes were shared with modern hairless breeds, although the researchers were unable to recover the FOXI3 mutation from those archaeological specimens.
This is important because it demonstrates how difficult it is to identify an ancient Xolo.
Hair does not normally survive in archaeological contexts.
Teeth and bones do.
Therefore, researchers often look for the dental abnormalities associated with hairlessness.
A major 2013 study examined mitochondrial DNA from 43 Xoloitzcuintli and compared it with extensive samples from East Asian and European dogs.
The researchers found evidence consistent with a pre-Columbian origin for the Xolo lineage, while also finding that many of the Xolo haplotypes were widespread rather than unique.
This was an important step in understanding the breed's complicated genetic history.
The 2008 Science study by Drögemüller and colleagues identified the FOXI3 mutation responsible for the characteristic hairless phenotype in Mexican and Peruvian Hairless Dogs and Chinese Cresteds.
Later research examined the associated dental phenotype and showed how the same developmental pathway helps explain both missing hair and abnormal or missing teeth.
The 2018 Science study The Evolutionary History of Dogs in the Americas analysed ancient mitochondrial and nuclear genomes and demonstrated the enormous demographic impact of European colonisation on Indigenous American dogs.
The 2020 study Origins and Genetic Legacy of Prehistoric Dogs then showed that a small amount of pre-colonial ancestry survives in modern Xoloitzcuintli — approximately 3% in the study's model.
This research changed the way we think about “ancient breeds.”
The Xolo is ancient in its cultural identity and phenotype, but its modern genome reflects thousands of years of population change and, especially, the enormous genetic impact of European colonisation.
Anyone wanting to study Xoloitzcuintli history seriously should go beyond modern breed websites.
Some of the most useful works include:
One of the foundational modern works on the Xolo and its twentieth-century revival. Published in Mexico by the Instituto Nacional de Antropología e Historia.
A specialist study of ancient dog representations from Colima, published by INAH.
A broader historical work covering dogs in the Americas and their Indigenous cultural contexts.
An important Mexican work connecting the archaeological and historical Xolo with the modern breed.
A scholarly article exploring the possible continental movement of hairless dogs and their relationship to long-distance exchange networks.
A modern breed-focused reference aimed at breeders, judges and owners.
And, of course, there is another book that belongs in this conversation:
Your own book approaches the Xolo from a different direction: not as an archaeological monograph, but as a practical work written from the perspective of someone with long-term experience living and breeding the breed.
Its historical section connects the ancient cultural history with the modern revival, the 1954 expedition and the arrival of Xolos in Ukraine.
Mexico remains the historical and cultural centre of the breed.
The modern Xolo is more than an FCI breed.
It is a national cultural symbol.
The twentieth-century revival transformed the Xolo from a nearly forgotten Indigenous dog into a recognised national breed with an international pedigree system.
The breed also gained enormous cultural visibility through Mexican art.
Frida Kahlo and Diego Rivera helped establish the Xolo as an icon of Mexican identity, while later popular culture brought the breed to an even wider international audience.
The 2017 Pixar film Coco, featuring the Xolo named Dante, introduced the breed to millions of people who had never encountered one before.
The United States has a surprisingly long Xolo history.
Xolos were already appearing in American dog records in the nineteenth century.
The AKC records an early Mexican Hairless registration in 1887.
The breed later disappeared from the AKC system because its numbers were extremely low.
In the twentieth century, the breed's American history went through several stages of recognition and decline.
Finally, the Xoloitzcuintli returned to full AKC recognition in 2011, entering the Non-Sporting Group as the AKC's 170th recognised breed.
This is an unusual story:
the Xolo was recognised in the United States before it was secure in its own country.
Its modern international history therefore cannot be understood as a simple story of Mexico exporting a finished breed.
The breed was moving through several different recognition systems at the same time.
Canada also became part of the breed's international development.
Canadian kennel records show Xoloitzcuintli appearing in Canadian registrations and competition records, demonstrating that the breed had established a place in the North American purebred-dog community.
Today, Xolos participate in Canadian dog shows and remain a recognised breed within the Canadian cynological system.
The European history of the Xolo is less extensively documented in popular sources than the American history.
But the breed began moving beyond Mexico and North America during the second half of the twentieth century.
One particularly interesting episode concerns Hilary Harmer, who is reported to have brought two Xolos from the 1954 expedition to England in 1957. These dogs were subsequently displayed in London and later appeared in British dog shows.
This is historically significant because it shows that the international expansion of the modern Xolo began soon after the rescue expedition itself.
The breed was not simply “discovered” by Europe in the twenty-first century.
It was already crossing the Atlantic during the early years of its modern revival.
This is where we have to separate documented history from reasonable interpretation.
There is no single historical event that marks “the beginning of the European Xolo boom.”
Instead, several things changed at approximately the same time:
Therefore, it is reasonable to describe the twenty-first century as a period of accelerated internationalisation of the Xolo.
But it would be inaccurate to claim that the breed only reached Europe after 2000.
The historical record shows European involvement much earlier.
Today Xolos can be found in many European countries.
Their presence is particularly visible through:
The development of international transport has also made it possible for breeders to maintain connections with Mexico while working within European breeding systems.
This has changed the genetic geography of the breed.
A modern European Xolo may have Mexican ancestors, European ancestors, American ancestors and bloodlines connected to several different national breeding programmes.
That is one reason modern pedigrees are so important.
The history of the Xolo in Ukraine is much younger than its history in Mexico.
According to your book, Xoloitzcuintli appeared in Ukraine in the second half of the 1990s and have gradually developed since then, although the breed remains rare.
The Ukrainian population has historically been small, with relatively few breeders.
This has made international bloodline exchange particularly important.
Ukraine's position within the FCI system also allows Ukrainian breeders to work with internationally recognised pedigrees and import dogs from other countries.
The development of the Xolo in Ukraine is a good example of how the modern breed differs from the ancient dog population.
Ancient Xolos moved with people.
Modern Xolos move through:
In your own breeding programme, international imports have become an important part of maintaining genetic diversity.
Your book records that Sine Metu imported a breeding male from Mexico in 2021, from the Langarica kennel in Colima — an example of how modern Ukrainian breeding can reconnect with the historical homeland of the breed.
There is a fascinating symmetry here.
Thousands of years ago, dogs moved with human populations.
Centuries ago, hairless dogs may have travelled through long-distance Indigenous trade networks.
In the nineteenth and twentieth centuries, Xolos crossed borders through individual imports.
After the 1954 expedition, selected dogs helped rebuild the breed.
Today, breeders deliberately import dogs and frozen or fresh genetic material, maintain pedigrees and plan international matings.
The mechanism has changed.
The underlying principle has not:
dogs move with people.
The Xoloitzcuintli is sometimes described as a “living archaeological artefact.”
That expression should not be taken literally.
The modern Xolo is not an untouched dog frozen in time.
It has been affected by:
But it still preserves an extraordinary combination of characteristics that connect the modern dog with ancient Mexican representations:
That combination is what makes the breed historically extraordinary.
Older breed histories often presented a simple narrative:
ancient Mexican dog → unchanged for thousands of years → modern Xolo.
Modern research tells us something more complicated — and more interesting.
The ancient dogs of the Americas had their own genetic history.
European colonisation almost destroyed that genetic legacy.
Modern Xolos retain only a small measurable proportion of pre-colonial ancestry according to current genomic models.
Yet the phenotype, cultural identity and breeding history of the Xolo continued.
This means the modern Xolo is simultaneously:
an ancient cultural symbol, a modern dog breed, a product of twentieth-century conservation, and a genetically reconstructed population.
Without the 1954 expedition, the modern history of the Xolo might have been completely different.
The expedition demonstrated that dogs representing the traditional type still survived in remote parts of Mexico.
Ten selected dogs became the foundation of the recovery programme.
A standard was created.
Registration began.
International recognition followed.
Breeders continued the work.
And eventually the breed spread around the world.
Your book therefore correctly treats the Xolo Expedition as one of the central turning points in the breed's modern history.
To understand the breed properly, it is useful to separate two timelines.
This includes:
This includes:
Both histories are necessary.
Without the ancient history, the breed loses its cultural meaning.
Without the modern history, we do not understand how the Xolo survived.
Thousands of years ago
Dogs enter the Americas alongside human populations.
Pre-Columbian Mesoamerica
Hairless dogs become part of Indigenous societies in Mexico and appear in archaeological material.
Ancient western Mexico
Dog-shaped ceramic vessels and funerary objects become especially prominent in regions such as Colima.
Pre-Hispanic period
Dogs become associated with funerary and religious traditions and with Xolotl.
Sixteenth century
Spanish chroniclers and Indigenous informants document different types of dogs in Mexico.
Sixteenth century — Florentine Codex
Sahagún's work records the Xoloitzcuintli and provides an important written and illustrated source.
After Spanish colonisation
Indigenous dog populations decline dramatically.
Nineteenth century
Xolos begin appearing in international dog records, including the United States.
1887
The AKC records an early Mexican Hairless/Xolo registration.
Early twentieth century
The Xolo becomes part of the Mexican cultural revival.
1954
The Xolo Expedition led by Norman Pelham Wright searches remote regions of Mexico and identifies ten foundation dogs.
1956
Mexico formally recognises the breed and establishes an official standard.
1960
Norman Pelham Wright publishes El enigma del xoloitzcuintli.
1961
The Xoloitzcuintli receives definitive FCI recognition.
Late twentieth century
The breed gradually expands internationally.
Late 1990s
Xoloitzcuintli appears in Ukraine, according to the Sine Metu historical record.
2008
FOXI3 is identified as the gene underlying the hairless phenotype.
2011
The Xolo returns to full AKC recognition in the United States.
2018
Ancient-DNA and archaeological studies deepen our understanding of Mexican hairless dogs and the disappearance of Indigenous American dog lineages.
2020
Ancient-genome research estimates that the modern Xolo retains approximately 3% pre-colonial ancestry.
Today
The Xoloitzcuintli is an internationally recognised breed with breeding programmes across Mexico, North America, Europe and other regions.
Many dog breeds have an interesting history.
Very few, however, connect so directly with:
The Xolo is unusual because its story is not contained within the history of dog shows.
Its story begins thousands of years before dog shows existed.
The name has survived.
The dog has survived.
The culture around it has changed.
The genetic population has changed.
The breeding system has changed.
The countries in which the dogs live have changed.
But the Xoloitzcuintli remains recognisable.
That is perhaps the most remarkable part of its history.
The modern Xolo is not a perfect biological time capsule.
It is something more interesting:
a breed whose ancient cultural identity survived through centuries of demographic change, colonial disruption, near-extinction and modern reconstruction.
Preserving a breed is not only about preserving its appearance.
It is also about preserving the knowledge surrounding it.
For the Xoloitzcuintli, that knowledge includes:
Understanding the breed's history also changes how we see the dog itself.
A Xolo is not simply “a hairless dog from Mexico.”
It is the modern representative of one of the most unusual and culturally significant canine histories in the Americas.
The story of the Xoloitzcuintli did not end with the 1954 expedition.
In many ways, that expedition marked the beginning of the modern chapter.
Today, breeders have responsibilities that the people of the ancient world never had.
We have access to:
That gives modern breeders an extraordinary opportunity.
The task is not simply to produce more Xolos.
The task is to preserve the breed's identity while improving its health, genetic diversity, structure and temperament.
That is the next chapter of Xoloitzcuintli history.
And unlike the ancient chapters, this one is being written now.
The Xoloitzcuintli has travelled an extraordinary distance.
From ancient Mesoamerican settlements to modern Mexican cities.
From funerary ceramics to international dog shows.
From the world of Xolotl and Mictlan to modern genetics.
From near extinction to recognised international breed.
From ten foundation dogs found during the 1954 Xolo Expedition to breeding programmes on several continents.
From Mexico to the United States, Europe, Ukraine and beyond.
The history of the Xoloitzcuintli is therefore not simply a story about the oldest hairless dog.
It is a story about survival.
It is a story about people and dogs moving together through history.
And it is a story about how a breed can nearly disappear — and still come back.
The Xoloitzcuintli survived the collapse of the world in which it was born.
It survived colonisation.
It survived neglect.
It survived near extinction.
And in the twentieth century, a small group of people decided that this ancient Mexican dog was worth saving.
That decision changed the future of the breed.
Today, every responsibly bred Xolo carries not only a pedigree, but a history.
And understanding that history is part of understanding the dog itself.
Norman Pelham Wright. El enigma del xoloitzcuintli. Instituto Nacional de Antropología e Historia, Mexico, 1960.
Carolyn Baus de Czitrom. Los perros de la antigua provincia de Colima. Instituto Nacional de Antropología e Historia, 1988.
Patricia Carot & Marie-Areti Hers. “De perros pelones, buzos y Spondylus. Una historia continental.” Anales del Instituto de Investigaciones Estéticas, 2016.
Barbara van Asch et al. “Pre-Columbian origins of Native American dog breeds, with only limited replacement by European dogs, confirmed by mtDNA analysis.” Proceedings of the Royal Society B, 2013.
Cord Drögemüller et al. “A mutation in hairless dogs implicates FOXI3 in ectodermal development.” Science, 2008.
Aurélie Manin et al. “Can we identify the Mexican hairless dog in the archaeological record?” Journal of Archaeological Science, 2018.
Máire Ní Leathlobhair et al. “The Evolutionary History of Dogs in the Americas.” Science, 2018.
Anders Bergström et al. “Origins and Genetic Legacy of Prehistoric Dogs.” Science, 2020.
Florentine Codex, Book XI, folio 17r. Digital Florentine Codex, Getty Research Institute.
FCI Standard No. 234 — Xoloitzcuintle. Fédération Cynologique Internationale.
Sine Metu. Life with Xolo — historical section and breeder perspective on the Xoloitzcuintli.
Is a mono-breed Miniature Xolo kennel.
We know everything about the Xolo breeding and even more.
We choose only the best Xolo bloodlines in the world for the breeding purpose in our kennel.
Our graduates live in more than 15 countries in Europe, the USA and Canada.
All our breeding dogs get tested for genetic diseases and are in excellent health condition.
