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Blue Spice, foundation female of the Flintridge line of Australian Shepherds, alone and with two offspring by Harper's Old Smokey, Salt and Chili circa 1964. Their breeder Dr. Weldon T. Heard was one of the most influential breeders in in the breed's history, with thousands of today's pedigrees tracing back to Flintridge dogs, including perhaps the greatest percentage of Aussies in the AKC show ring.

By their very nature, dog breeds are connected to specific places, reflecting both their native climates and cultures. As a result, the names of dozens of breeds incorporate their national origins, from the German Pinscher to the Swedish Vallhund to the Bernese Mountain Dog.

And then there’s the exception that proves the rule: the Australian Shepherd.

Despite its formal moniker, this medium-sized herding dog is a quintessentially American breed, developed in Western states like California, Colorado, Wyoming, and Idaho to tend to the large flocks of sheep grazing there.

And that’s pretty much where the consensus ends.

Who was the likely ancestor who bequeathed the Australian Shepherd its medium-length coat and natural bobtail, as well as the blue eyes and merle patterning that appear in some dogs? What’s the reason for the Aussie reference in the breed name? And how much of the breed identity is owed – at first glance, inexplicably – to the Basques, a culturally distinct group of Spaniards whose tenure on the Iberian Peninsula dates back to Roman times?

All good questions. And all without many definitive answers.

Where Did the Australian Shepherd Come From?

To find the Australian Shepherd’s earliest roots, we go first to the white-washed adobe missions established by the Conquistadors, who arrived in the New World in the 1500s. Needing meat to supply their soldiers and clergy, the Spaniards imported their hardy native Churras sheep, as well as herding dogs to tend them. Some early accounts describe a wolf-like dog, much larger than the modern Australian Shepherd, yellowish or black and tan in color, and more a guardian than a herder.

For a better ancestral fit, we can look to the progenitors of the Carea Leonés, a smaller, energetic sheepdog from the León region of northwestern Spain, which herded the Churras sheep alongside the Spanish Mastiffs that guarded them. Careas have merle coats that can be of medium length, and can have blue eyes. Though there is no evidence that Careas-like dogs were brought to the Americas with the Conquistadors, their similarity to the Aussie is nonetheless intriguing.

Regardless of their provenance, as the centuries slogged on, these Spanish-derived herders procreated apace, creating a kind of generic sheepdog that populated New Mexico, California, and beyond.

In the mid-1800s, this sleepy evolution was jostled by boom times: The California Gold Rush created a soaring demand for sheep to feed the torrent of newly arrived miners; the aftermath of the Civil War exacerbated the need for a steady national supply of mutton and wool. The American West again found itself in need of an infusion of sheep – along with more dogs to herd them.

Little Blue Dogs — Not From Australia?

Farmers in the Midwest and East sent their flocks west, accompanied by the British-derived sheepdogs that had been tending them for generations. Many of these dogs originated from working Collies, which oftentimes were merle, as well as tricolor, and black or tan with white – typical Australian Shepherd colors and patterns.

These English Shepherds, as they were called, also occasionally produced dogs with half-tails, or no tails at all.

Most of the sheep that were brought to the West in the late 19th Century were Merinos. These luxuriously coated bleaters originated in Spain, where their export was punishable by death until the 1700s, when Charles III of Spain sent some to his cousin, Prince Xavier of Saxony. After crossing the newly arrived Merinos with their Saxon sheep, the Germans soon became an epicenter of Merino breeding. One German émigrée in particular brought these improved Merinos to Australia, where they soon numbered in the millions, eventually traveling from there to a sheep-starved American West.

Newspaper accounts of the arrival of these sheep from Down Under also mentioned the Australian Shepherds that accompanied them. Much like the English Shepherds that came from the east, these “little blue dogs” weren’t a bonafide breed, but rather a loosely defined type. They, too, were derived mostly from British stock, as was most of Australia’s human population. No one in Australia called them Australian Shepherds – that name was given to them by observant Americans who knew where they came from. While these Australian arrivals weren’t necessarily numerous, eventually every merle sheepdog earned that moniker.

Evidence that the Australian Shepherd we know today derives from British herding dogs, whether via the eastern United States or Australia, is underscored by the landmark 2017 Cell Reports study that examined the canine genome to see how dog breeds are related and, by extension, how they developed. The study found that dogs can be genetically sorted into 18 clades, or groups of related dogs. The Australian Shepherd belongs to the UK Rural clade, alongside the Collie, Shetland Sheepdog, and Border Collie. Like many of the dogs in that clade, the Australian Shepherd carries the MDR1 mutation, which causes sensitivity to ivermectin, among other substances, and the breed can develop Collie eye anomaly – disease sharing that is further testament to its British roots.

A Mix of Many Different Cultures

Interestingly, the study also found that 10 percent of German Shepherd Dogs also carried the MDR1 gene, and posited that the Australian Shepherd either contributed to this quintessentially German breed – or that the two had a common ancestor. Given the Merino sheep’s journey from Germany to Australia to the U.S., it’s conceivable that there were some German herding dogs in tow as well. It’s interesting that a merle, wall-eyed Australian breed known as the Koolie is sometimes called the German Coolie, or “German Collie,” though some authorities say it is a misnomer. Given that herding dogs are often imported alongside the sheep they tend, is it?

If that doesn’t complicate things enough, enter the Basques. For a solid century, from the 1870s to the 1970s, these immigrants from northern Spain found work out west as sheepherders, arriving in large numbers during the Gold Rush. Breed authorities argue – quite vehemently – over their role in the Australian Shepherd’s development: Did the Basques simply herd with the mostly British-derived dogs that were already in the West when they arrived, creating an oft-misunderstood association with the Australian Shepherd? Or did they bring their own herding dogs with them? And if they did, where were they coming from? While popular accounts say the American West’s Basque sheepherders came by way of Australia, the bulk left Spain for Argentina, Chile and Paraguay, eventually heading north to California in the hopes of striking it rich as miners. Whether they would have brought dogs with them is an open question.

Like many Americans whose ancestors arrived in previous centuries, the Australian Shepherd is a confounding mix of many different cultures, influences, and national identities. Sorting them out is likely impossible, but in the end it doesn’t matter much: The American idiom has never been about looking in the rearview mirror.

As for the road ahead, the Australian Shepherd is the country’s 13th most popular breed according to the AKC’s 2019 registration statistics, a ranking that has been rising in recent years. While reputable breeders are cautious about popularity – not every home is appropriate for one of these clever, high-energy dogs – the Australian Shepherd has come a long way from the lonely, wind-whipped mesas of the American West. No matter the long-ago details of how they got there, we’re certainly glad they’re here.

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