A 14,300-year-old dog jawbone from Gough’s Cave in Somerset has spent nearly a century in the Natural History Museum’s collections. In March 2026, ancient-DNA work finally confirmed what its bones alone could not: genetically, the animal was a dog rather than a wolf.

It was not even the oldest dog in the study. An individual from Pınarbaşı in Türkiye dated to about 15,800 years ago, giving researchers the earliest genetic evidence of domestic dogs yet identified and pushing their confirmed history deep into the final millennia of the Ice Age.

The self-domestication idea, plainly stated

One influential explanation for how wolves became dogs is known as the commensal scavenger hypothesis. It proposes that some Palaeolithic wolves began approaching human camps for edible waste and other resources, and that the bolder, less fearful animals were better able to exploit that new ecological niche.

Over generations, the argument goes, natural selection could have favoured wolves able to remain closer to people. Humans may only have begun actively shaping those animals later, once a population accustomed to life around human settlements already existed.

That is a hypothesis, not a reconstruction scientists can treat as settled fact. In a 2021 review in Frontiers in Veterinary Science, University of Pennsylvania researcher James A. Serpell described the commensal scavenger model as a dominant account in the literature but argued that it does not fit what is known about Pleistocene hunter-gatherer societies. He favoured a competing model in which people adopted and socialised wolf pups.

Other reviews continue to treat scavenging, human adoption and cooperative hunting as competing possibilities. The evidence is strong that dogs emerged from Ice Age wolves. Exactly what brought particular wolves and people together in the first place remains open.

What the new ancient DNA actually shows

The 2026 study brought together researchers from institutions including the Natural History Museum, LMU Munich, Oxford and the University of York. Whole genomes recovered from ancient canids showed that dogs were already widely distributed across Europe and Anatolia by at least 14,000 years ago.

The team identified dogs associated with culturally and genetically distinct hunter-gatherer populations, including Magdalenian and Epigravettian groups. That makes an older origin likely because recognisably dog-like populations had already spread across a large part of western Eurasia by the time these animals died.

It does not tell us precisely how domestication began. Olaf Thalmann and colleagues had already produced an earlier estimate in a 2013 Science study using ancient mitochondrial genomes. Their molecular dating placed the onset of domestication between about 18,800 and 32,100 years ago, which is one reason dates approaching 30,000 years continue to appear in discussions of dog origins.

That upper range remains debated. Fossils older than the newly confirmed dogs have sometimes been proposed as early dogs or dog-like wolves, but genetic confirmation becomes much firmer around the end of the Ice Age.

The Pınarbaşı fish tell a different part of the story

Stable-isotope analysis produced one of the most intimate findings in the 2026 study. Dogs at Pınarbaşı had diets unusually rich in fish and closely resembling those of the humans living at the site.

University of York researcher Lizzie Hodgson said it was unlikely the dogs were catching significant quantities of fish themselves, making active feeding by humans the more plausible explanation. Along with evidence of intentional burial, the result points to dogs already being closely integrated into human communities.

But provisioning is not evidence that scavenging caused domestication in the first place. By 15,800 years ago these animals were already genetically identifiable as dogs, so people feeding them tells us about an established human-dog relationship rather than the first steps that created it.

The Ice Age also preserved wolves that stayed wolves

Two remarkably preserved canid pups found near Tumat in northeastern Siberia in 2011 and 2015 provide a useful counterpoint. A 2025 analysis identified the roughly two-month-old sisters as wolves rather than early domestic dogs. They were eating solid food, including woolly rhinoceros meat, while still nursing.

In January 2026, Sólveig M. Guðjónsdóttir and colleagues published a separate study in Genome Biology and Evolution after sequencing a high-coverage woolly-rhinoceros genome from tissue preserved inside one of the pups’ stomachs. The study was primarily about the rhino population shortly before extinction, but the extraordinary sample also offers a snapshot of genuinely wild wolves living about 14,400 years ago.

The Tumat animals should not be turned into literal “wary siblings” of the early dogs. They came from a different region and the available evidence does not establish a direct population relationship. What they show more safely is that unmistakably wild wolves and unmistakably domestic dogs both existed near the end of the Ice Age.

Modern wolf ancestry tells us something else

Another genetic result from late 2025 adds an unexpected chapter much later in the story. Audrey Lin and colleagues at the American Museum of Natural History and Smithsonian National Museum of Natural History examined more than 2,700 published canid genomes in a study published in Proceedings of the National Academy of Sciences.

They found detectable post-domestication wolf ancestry in almost two-thirds of the breed dogs they analysed and in every village-dog genome in the dataset. The average admixture event in breed dogs dated to roughly 1,000 generations ago.

Village dogs also showed enriched wolf ancestry around olfactory-receptor genes, which the researchers suggested may have helped free-ranging dogs locate food in human environments. Even the chihuahua carried about 0.2 percent wolf ancestry.

Those findings show that the genetic boundary between dogs and wolves has remained somewhat porous long after domestication. They do not tell us whether the first wolves became dogs by scavenging beside Palaeolithic camps.

What we know, and what remains a hypothesis

The broad timeline is becoming clearer. Dogs diverged from an extinct wolf population during the Late Pleistocene, and genetically confirmed dogs were living among hunter-gatherers in western Eurasia by at least 15,800 years ago. By roughly 14,000 years ago they were already geographically widespread.

The mechanism is harder. A scavenging population becoming progressively more tolerant of people is biologically plausible and has been influential in dog-domestication theory, but it competes with models involving the adoption of wolf pups, deliberate human intervention and forms of cooperation between hunters and wolves.

The newest genetic evidence does not settle that contest. What it does is move the point at which dogs were unquestionably dogs further into the Ice Age and show that their relationship with people was already close enough to include shared food and, in some cases, burial.

Cats show what stronger commensal evidence looks like

Cats offer a useful comparison because their commensal pathway has more direct archaeological support. Work on early farming settlements has found evidence that rodents exploited stored grain, that cats preyed on those rodents and that some cats scavenged or were fed by people.

The dog story may eventually resolve into something similar, or it may turn out to have depended more heavily on deliberate relationships between humans and wolves from the beginning. For now, the 15,800-year-old dog at Pınarbaşı and the 14,300-year-old jaw from Gough’s Cave mark something firmer than either origin story: by the closing stages of the Ice Age, wolves had already become dogs, and some of those dogs were eating beside us.