Vulnerable Dog Breeds Blog Series - Blog 5

There comes a point in some vulnerable breeds when careful breeding within the local population is no longer enough.

The dogs may still look different. The kennel names may be different. But when you trace the pedigrees, too many roads begin leading back to the same families.

That is when breeders have to ask a difficult question: do we need new blood?

New Zealand makes this question very real

Breeding a vulnerable breed in New Zealand is not the same as breeding it in a country with hundreds of accessible dogs.

Our practical gene pool can be tiny. A breed may have useful diversity overseas, but until we can actually access those dogs or semen, that diversity is not available to us.

If you want the background on why a small gene pool matters so much, read Population Genetics Made Simple: Why Genetic Diversity Matters in Vulnerable Dog Breeds.

Australia is often the first place people look, and sometimes it offers exactly what is needed. But Australia and New Zealand can also share many of the same imported foundation lines, so 'overseas' does not automatically mean 'different'.

New blood has to be genuinely new

The first question I ask is not simply whether an overseas dog is beautiful or successful.

I want to know whether that pedigree genuinely adds something different to what we already have.

If the dog ultimately traces back to the same heavily represented families, we may spend a great deal of money importing a new animal without meaningfully widening the population.

That is why pedigree research has to come before excitement.

A pedigree's COI is a useful starting point, but it has limits. See Coefficient of Inbreeding: What It Tells You - and What It Doesn't.

DNA-based testing, such as the UC Davis Veterinary Genetics Laboratory's canine genetic diversity test, can add another layer by showing how much diversity a dog may actually bring to a breed.

Frozen semen can be the simplest route

For New Zealand, frozen semen is often the most practical way to bring in genetics. It avoids transporting a live dog across the world and allows a breeder to access a dog who may be older, deceased or never realistically available for sale.

But it still involves planning. Semen quality, collection, storage, transport, import requirements, timing and reproductive veterinary work can all affect whether the attempt succeeds.

And even when semen arrives safely, nature still gets a vote.

A live dog can bring more than one mating

Importing a live dog may offer greater flexibility because that dog can potentially be assessed in person, used with more than one suitable bitch and contribute over a longer period.

But the financial and practical risk is much higher.

Currency conversion alone can make an overseas purchase expensive. Then there are veterinary tests, export preparation, transport, import requirements and size-dependent airfare. I have personally experienced how painful that risk can be: I lost close to NZ$30,000 over Canadian puppies that were held and never sent or refunded.

I do not raise that to accuse anyone here. I raise it because 'just import a dog' can sound very simple when it is anything but.

Temperament still comes first

New genetics are only useful if the dog itself is useful.

For me, temperament comes first. Then I look at structure and movement, health, family history and breed type.

I do not want to widen a gene pool by introducing problems we could reasonably have avoided.

At the same time, demanding absolute perfection from every imported dog can defeat the purpose. No dog is genetically perfect. Preservation breeding means balancing risk rather than pretending risk can be eliminated.

One imported line should not become the next popular sire problem

A new line can be enormously valuable, but only if we manage it carefully.

If one imported male arrives and everybody immediately uses him, we may simply replace one bottleneck with another.

The Kennel Club's guidance on health screening for dog breeders also warns about the risks of inbreeding and the overuse of popular sires.

I would rather see useful new genetics spread thoughtfully across different suitable bitches and then branch in different directions over later generations.

That gives breeders a chance to retain the benefit without turning the new arrival into the next dominant ancestor.

Sometimes the answer may be a formal outcross

In a severely restricted population, breeders and breed organisations may eventually need to consider an organised outcross to another breed.

That is not the same thing as casually producing crossbred puppies. A genuine breed-conservation outcross has a defined purpose, health goals, planned selection and a strategy for how descendants are assessed over generations.

WSAVA has recognised that purposeful crossbreeding can be one option when a breed no longer has enough healthy diversity within its existing population.

That conversation can be uncomfortable, but avoiding it does not create genetics that are no longer there.

New Zealand can contribute back - Not just the All Blacks 😉

I also think we need to stop seeing New Zealand only as the country that needs genetics from everyone else.

If we establish genuinely different lines here and manage them carefully over several generations, those lines may eventually become useful to breeders overseas.

That is what international preservation should look like: not one-way importing, but a network of people keeping different branches alive and sharing them when they are needed.

A vulnerable breed survives because enough doors remain open in enough places.

Founder perspective

I am Fiona Robertson, founder of Newflands. My perspective comes from decades of living with, breeding and studying dogs, my background as a veterinary nurse, and years spent researching pedigrees and bloodlines in New Zealand and overseas.

This series is not about pretending there is one perfect formula for breeding. It is about opening up the conversations that matter when the population is small and every generation can change the choices available to the next one.

Next in the series: Protecting a Breed Without Gatekeeping.

FAQs

How do breeders know when a breed needs new blood?

Warning signs include very limited unrelated mates, steadily rising relatedness, repeated ancestors across most pedigrees, loss of important lines and difficulty making health-conscious matings without narrowing diversity further.

Does importing a dog always improve genetic diversity?

No. An imported dog may still be closely related to the local population. Breeders need to examine the actual pedigree and wider genetic contribution, not just the country of origin.

Is frozen semen useful for rare dog breeds?

Yes. Frozen semen can preserve and move genetics without transporting a live dog, but success depends on semen quality, storage, import requirements and reproductive timing.

Can an outcross be responsible breeding?

Yes, when it is a structured conservation programme with clear health and population goals, careful selection and long-term follow-up. It is different from producing an unplanned cross.

Can new blood be overused?

Yes. A valuable imported dog can create a new bottleneck if too many breeders use the same individual or family.