Ancient Peruvian hairless dogs offer clues to early breeding

A new archaeological study is offering an unusually vivid look at ancient dogs, and at the people who lived with them. Researchers examining remains from Castillo de Huarmey in Peru say they’ve identified the first physical evidence of Peruvian hairless dogs at the Wari Empire site, including a naturally mummified male dog radiocarbon dated to at least 1,200 years old. The work was published in the Journal of Anthropological Archaeology and later highlighted by Dartmouth and ScienceDaily in October 2026. (sciencedaily.com)

The site itself has been important to archaeologists for years. Castillo de Huarmey, about 190 miles north of Lima, is described by Dartmouth as a 110-acre Wari administrative and funerary complex occupied roughly from 600 to 1050 CE, and it previously yielded an undisturbed elite tomb and later burials of high-status craftspeople. That broader context matters because the dog remains weren’t found in isolation; they were part of a larger ritual, domestic, and political landscape tied to one of the Andes’ major pre-Inca states. (home.dartmouth.edu)

In the new paper, the team reports 341 dog bone specimens representing a minimum of 19 dogs from excavation seasons spanning 2010 to 2025. Among the most striking finds were a naturally mummified dog skull with preserved skin and attached ears, painted with cinnabar, a second large skull, and a nearly complete naturally mummified male dog buried in a shallow pit. The hyper-arid coastal environment helped preserve organic material that would usually be lost, while radiocarbon dating made the complete mummified dog the oldest directly dated specimen yet reported from the site. (home.dartmouth.edu)

Identification of the animals as hairless dogs hinged on a detail veterinarians will recognize as especially relevant: dentition. Lead author Weronika Tomczyk said the dogs were not simply missing teeth from trauma or disease; some teeth, especially first premolars and sometimes last molars, had never erupted. The researchers connected that pattern to the same genetic basis associated with hairlessness in dogs. Modern breed information from the American Kennel Club’s parent-club health statement also notes missing teeth as a genetic trait in the hairless variety of the Peruvian Inca Orchid, the AKC-recognized modern breed related to the Peruvian hairless dog. (home.dartmouth.edu)

The study also suggests these dogs occupied different roles in Wari society. Some were intentionally buried, including a 6- to 8-week-old puppy interred with an elite craftsperson known as the “Master Basketmaker,” while others appear to have been discarded as refuse. Isotopic analysis of bone and teeth indicated that most dogs consumed some maize and, in general, had diets resembling those of humans. Dartmouth’s summary adds that suspected hairless dogs, when puppies, showed diets more similar to children’s, before becoming more variable as adults. Tomczyk described those findings as evidence of a complicated human-dog relationship rather than a simple story of pets or ritual animals. (home.dartmouth.edu)

That nuance is the most useful takeaway for veterinary readers. The paper doesn’t just push back the physical record for a well-known hairless breed type; it also reinforces how longstanding the links are among canine phenotype, dental development, selective breeding, and human caregiving. For clinicians, especially those counseling pet parents of hairless breeds, the study is a compelling deep-history example of how external traits and oral findings can be biologically connected, not incidental. It also underscores that the human-animal bond has always been variable, shaped by culture, status, and practical need as much as affection. (home.dartmouth.edu)

There’s cultural context here, too. Peru has long treated the hairless dog as a national symbol: a 2000 cultural directive required Peruvian hairless dogs to be kept at certain coastal museums and archaeological sites, and later legislation recognized the breed as part of Peru’s national heritage. That makes the Castillo de Huarmey findings more than a curiosity. They add physical evidence to a cultural story that had already been preserved in art, law, and living breed identity. (datosperu.org)

What to watch: The next step is whether follow-up work can tighten the chronology, expand isotopic comparisons, or even recover genetic data that confirms how closely these Wari dogs relate to modern Peruvian hairless lines; for now, the study gives veterinarians and researchers a rare archaeological window into the long history of breed-associated traits and human care. (sciencedirect.com)