What is a purebred dog?
By Jennifer Stoeckl, MAT - Dire Wolf Project CEO, May 13, 2026
Last September, the Royal Kennel Club in the United Kingdom quietly announced something that could eventually reshape the entire pedigree dog world.
Most people probably missed it.
And I don't blame anyone if they did.
Between wars, inflation, work, and everyday life, who in their right mind is paying attention to kennel club policy changes?
Oh yeah... ME!
(I'm actually way more obsessed with dogs than even I knew!)
So, here's the scoop...
Through the LeoGen project, the Royal Kennel Club created a new program called the “Development Register” for Leonbergers to bring fresh blood (crossbreeds) into the breed and improve long-term health.
SAY WHAAAAAT??
Did the Royal Kennel Club of the UK just endorse…
CROSSBREEDING?!!!
Why yes… yes, they just did!
And because they’ve now recently acknowledged ( Sept. 2025) what we’ve been saying for decades, I have to wonder:
What exactly is a purebred dog then?
For over a hundred years, kennel clubs have operated on the idea of the closed registry.
Once a breed was established, only dogs descending from that registered population could continue producing future generations.
That system created consistency.
Dogs became more predictable in appearance, temperament, and behavior.
But, unfortunately, it also narrowed the gene pool over time.
Now the Kennel Club has openly acknowledged that some breeds have become so genetically limited that outside dogs may need to be introduced to strengthen the population.
And that simple fact changes the conversation entirely.
As of today, Google AI currently defines a purebred dog this way:
“A dog whose sire (father) and dam (mother) are of the same recognized breed, typically with documented ancestry (pedigree) spanning many generations. Purebreds are bred to adhere to specific standards regarding appearance, temperament, and function, offering high predictability in how they look, act, and grow.”
At first glance, that sounds straightforward.
But here’s the uncomfortable question.
If new blood is intentionally brought into a breed, and those descendants are later accepted back into the registry, then what exactly makes the breed “pure”?
It can no longer simply mean a permanently closed bloodline, because the Royal Kennel Club itself has now admitted that permanently closed populations can run into serious health limitations.
So maybe purity was never really the defining feature of a breed in the first place.
Maybe what matters more than purity is:
- consistency,
- predictability,
- careful selection over generations,
- the ability to reliably produce dogs that look, behave, and function like the breed they represent.
Well now, that is a very different way of thinking about purebred dogs than most people were raised with.
And dare I say much closer to the Strongbred™ ideal recognized by our founder, Lois Schwarz, so many years ago.
What’s especially interesting is that the Royal Kennel Club still seems to treat outside blood as only a temporary fix.
Oh, my sweet summer child!
You still have so much to learn.
Here’s how their new crossbreeding concept currently operates.
The Development Registry opens briefly to strengthen a breed, then once the breed integrates the new genetic material, it closes again to maintain purity.
And when does purity return, pray tell?
We'll have to wait and see how the Royal Kennel Club decides to answer that question.
In contrast, the Dire Wolf Project™ approaches the problem from a very different angle.
The Strongbred™ concept was built around the idea that living populations require long term stewardship rather than emergency intervention after diversity has already collapsed.
Many people hear the phrase “open studbook” and imagine random crossing without structure or accountability.
Chaotic crossbreeding is not the Strongbred™ model.
Within the Dire Wolf Project™, breeders occupy different roles designed to preserve coordination, oversight, and population stability over time.
- Surrogate Breeders raise and nurture puppies but do not decide breeding pairings.
- Certified Breeders remain responsible for the health, temperament, structure, and long term outcomes of the bloodlines they produce.
- Crossbred Breeders evaluate population wide genetic needs using real time data collected throughout the breed. New crosses are introduced carefully because every genetic contribution influences the future direction of the population itself.
- Mentor Breeders help mentor other breeders and preserve breeding knowledge across generations,
- Master Breeders represent the highest level of long term stewardship within the structure by completing all of the other breeder roles.
This is not random crossing, my friends.
It is governed population management.
Critics of open population systems are correct about one thing, though:
Without structure,
breeding programs eventually
dissolve into chaos.
The Strongbred™ concept solves that problem through hierarchy, accountability, and shared responsibility for the population as a whole.
And that fact may ultimately become one of the largest differences between the traditional purebred pedigree system and the Strongbred™ philosophy.
It sure seems like the Royal Kennel Club is still committed to preserving the closed registry system as the gold standard of breed preservation.
Whereas, the Strongbred™ concept asks whether permanently sealing living populations was ever the healthiest long term strategy to begin with.
That is the conversation quietly beginning to emerge beneath the surface of the dog world right now.
And whether the kennel clubs intended it or not, the LeoGen project may have opened the door to questions that cannot easily be closed again.
If you want to explore the science, philosophy, and long term vision behind the Strongbred™ dog concept much more deeply, then the Dire Wolf Project™ book is your trailhead into that world.
Inside the book, I walk through the biological limitations of permanently closed populations, the history of dog domestication, the future of governed genetic stewardship, and the reasoning behind the Strongbred™ philosophy itself.
In many ways, the greater dog world is only just beginning to stumble into questions we have already spent years wrestling with behind the scenes.
If you are curious where all of this may eventually lead, this is the place to begin your journey:
https://www.amazon.com/Dire-Wolf-Project-Creating-Extraordinary/dp/1950333019
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Jennifer Stoeckl is the co-founder of the Dire Wolf Project, founder of the DireWolf Guardians American Dirus Dog Training Program, and owner/operator of DireWolf Dogs of Vallecito. She lives in the beautiful inland northwest among the Ponderosa pine forests with her pack of American Dirus dogs.