Are Purebred Dogs Inbred and What You Need to Know

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Posted Nov 9, 2024

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Crop unrecognizable ethnic female embracing and caressing cute purebred dog with open mouth on parquet in room
Credit: pexels.com, Crop unrecognizable ethnic female embracing and caressing cute purebred dog with open mouth on parquet in room

Purebred dogs have been bred for thousands of years, with evidence of dog breeding dating back to ancient civilizations.

Selective breeding has led to the development of over 340 recognized breeds, each with its unique characteristics and traits.

However, this selective breeding can also lead to a lack of genetic diversity, making purebred dogs more prone to inherited health issues.

What is Inbreeding?

Inbreeding is a type of reproduction where two closely related individuals, such as parents and offspring or siblings, mate to produce offspring.

This can lead to a higher risk of genetic disorders and health problems in the offspring. Inbreeding can result in a loss of genetic diversity, making the offspring more susceptible to diseases.

The goal of breeding programs is to produce offspring with desirable traits, but inbreeding can actually have the opposite effect. Genetic disorders can arise from the expression of recessive genes, which may not be present in more genetically diverse populations.

Inbreeding can also lead to a decrease in fertility and an increase in stillbirths. This is because the offspring may inherit two copies of a gene that can cause these problems.

If this caught your attention, see: Do Purebred Dogs Have More Health Problems

Why Diversity Matters

Credit: youtube.com, The Bizarre Truth About Purebred Dogs (and Why Mutts Are Better) - Adam Ruins Everything

Diversity is crucial for a species to thrive, and it's not just limited to humans. A wide variety of available genes means a species is more likely to be able to cope with change.

If a species isn't diverse, it may struggle to adapt to new challenges. This is why genetic diversity is linked to fitness to survive.

A key aspect of genetic diversity is minimizing the risk of inbreeding. Inbreeding occurs when a species mates with individuals that are too closely related, which can lead to a lack of genetic diversity.

Inbreeding can have serious consequences for a species, including reduced fertility and increased susceptibility to disease. This is because inbred individuals may carry genetic mutations that can make them more vulnerable to illness.

Here are some reasons why genetic diversity is important:

  1. A wide variety of available genes means a species is more likely to be able to cope with change.
  2. A wide variety of genes minimises the risk of inbreeding.

The Risks of Purebreds

Purebred dogs are often considered to be at a higher risk of inbreeding due to the limited gene pool.

Credit: youtube.com, Which is better? Purebred or Mixed breeds? The Answer is in the DNA!

The starting number of a breed can greatly impact the level of genetic diversity, with a low initial number like 22, as seen in the Nova Scotia Duck Tolling Retriever, creating a "founder effect" of low genetic diversity.

Inbreeding is a major threat to genetic diversity in dog populations, with the culture within pure breeder circles often prioritizing certain traits that are successful in the show ring over genetic diversity.

The inbreeding coefficient of 0.26 for Tollers is equivalent to the result of full-sibling matings, which is a serious concern.

Here are the inbreeding figures for ten other dog breeds to put this into perspective:

Inbreeding can have serious consequences for the health and welfare of dogs, including a high rate of immune-mediated disease and reduced genetic diversity.

The History and Basics of Dog Breeding

Until the 19th century, dogs were just dogs, with different regions having different types and uses.

Before kennel clubs were established, there were no rules governing dog breeding, and breeders could freely crossbreed dogs to create the type they wanted.

In the past, breeders did use inbreeding to develop and maintain certain qualities in dogs, but this increased the risk of hereditary conditions and illness while reducing genetic diversity.

Dog Breeding Basics

Credit: youtube.com, DOG BREEDING | EVERYTHING YOU NEED TO KNOW | BEGINNERS GUIDE

Dog breeding is an old practice that's been around for centuries, but it's not without its problems. Inbreeding, where two relative dogs mate to produce offspring with common ancestors, was once used to develop and maintain certain qualities, but it increased the risk of hereditary conditions and illness.

Inbreeding is most obvious in brachycephalic breeds, where focusing on looks has negatively impacted their health, particularly their ability to breathe properly.

Before the 19th century, dogs were just dogs, and there were no rules about breeding them. Different regions had different types of dogs, and breeders could choose any dog they wanted to breed with.

The establishment of kennel clubs in the 19th century created artificial genetic fences around small groups of dogs, resulting in today's purebreds.

Purebred dogs are often prone to health problems due to inbreeding, which can lead to a shorter lifespan. For example, Shih Tzus are supposed to live up to 14 years, but many have been known to pass away in their early 8s.

In fact, some breeders have lost multiple purebred dogs to health issues, leading them to question the ethics of inbreeding.

Puppy Farms

Credit: youtube.com, The History of Dog Breeding

Puppy farms are a concerning issue in the dog breeding world. I saw this firsthand with Maltese Shi Tzu crosses in the 90s.

These F1 crosses were initially impressive, but their health declined over time due to inbreeding. Their offspring were then used as future parents, repeating the cycle.

The same pattern repeated with Spoodles, Cavoodles, and Pugaliers. Each time, the early dogs were superb, but genetic faults soon appeared.

Inbreeding can lead to a range of health problems in dogs. It's a major concern in puppy farming.

The early dogs in these crosses were often healthy and well-suited for breeding. However, their offspring were more likely to inherit genetic faults.

Understanding Genetics and Inbreeding

Inbreeding is when two related individuals breed, increasing the likelihood that their offspring will inherit the same defective gene.

At a genetic level, inbreeding is simple: animals have two copies of each gene, one from each parent. This provides a backup copy, but if the gene is defective, it can cause problems.

Credit: youtube.com, Inbreeding, COI and how it affects your dogs

Inbreeding can lead to genetic diseases, congenital disabilities, and other issues in offspring. This is because inbreeding increases the probability that the same defective gene is carried by both parents.

If two dogs are paired together, even if they're distantly related, some exceptional genes can pass down through the lineage. However, genetics are not that simple, and where good combinations lie, bad ones do too.

Recessive genes, in particular, can be problematic. They're like a reserve gene that's dormant until the right combination hits. Inbreeding can cause recessive genes to pass along to the next generation more commonly than usual.

Inbreeding can cause hereditary and genetic diseases, declining health, and reduced fertility in offspring. This is because closely related family members pose a higher risk of receiving two bad copies of alleles for a single gene.

Some genetic conditions can skip generations, only to be reintroduced by having two copies of the same negative trait. This means that even if a breed seems healthy now, inbreeding can still lead to problems down the line.

Inbreeding can lead to short-term and long-term health problems, not just for the individual animal but also for the breed. This is why breeders must be diligently aware of purity in bloodlines to avoid genetic mishaps.

Take a look at this: Mixed Breed Dogs vs Purebred

Credit: youtube.com, Adam Ruins Everything - Pure-Bred Dogs Are Genetic Monsters

The incidence of genetic and hereditary conditions is multiplied when inbreeding occurs. This can lead to severe and fatal health issues, such as brachycephalic dogs' breathing difficulties.

Inbreeding can also cause birth defects, reduced immune function, poor puppy viability and survival, and reduced fertility. These are all serious consequences of inbreeding that can affect individual dogs and the breed as a whole.

Frequently Asked Questions

What dog breeds are not inbred?

Dogs with lower inbreeding rates include Tamaskan Dogs, Australian Labradoodles, and others, which have comparable vet care to mixed-breed dogs

Sources

  1. ICB Breeding for the Future (facebook.com)
  2. http://retrieverman.wordpress.com/2010/12/13/misunderstanding-the-concept-of-inbreeding-tolerance/ (wordpress.com)
  3. http://desertwindhounds.blogspot.com/2010/12/closed-registries-dogs-in-handbasket-to.html (desertwindhounds.blogspot.com)
  4. retrieverman (wordpress.com)
  5. http://www.cheetah.org/?nd=genetic_diversity (cheetah.org)
  6. http://www.canine-genetics.com (canine-genetics.com)
  7. https://johnwade.ca/attachments/article/359/russianfoxfarmstudy.pdf (johnwade.ca)
  8. http://pedigreedogsexposed.blogspot.com/ (pedigreedogsexposed.blogspot.com)
  9. http://pedigreedogsexposed.blogspot.com (pedigreedogsexposed.blogspot.com)
  10. http://www.petconnection.com/blog/2011/04/25/breed-profiling-what-does-it-mean-for-your-dogs-health/ (petconnection.com)
  11. http://onlinelibrary.wiley.com/doi/10.1111/j.1939-1676.2011.0695.x/full (wiley.com)
  12. http://topdocumentaryfilms.com/pedigree-dogs-exposed/ (topdocumentaryfilms.com)
  13. Gizmodo (gizmodo.com)
  14. Why Inbreeding Is Harming Purebred Dogs (walkervillevet.com.au)
  15. coefficient of inbreeding (dogagingproject.org)
  16. AKC (akc.org)
  17. reputable breeder (petkeen.com)
  18. Everything You Need to Know About Breeder Contracts – American Kennel Club (akc.org)
  19. Dog breeding regulation (thekennelclub.org.uk)
  20. Inbreeding depression causes reduced fecundity in Golden Retrievers – PMC (nih.gov)
  21. What animal welfare problems are associated with dog breeding? – RSPCA Knowledgebase (rspca.org.au)
  22. Novel protective and risk loci in hip dysplasia in German Shepherds – PMC (nih.gov)
  23. Problems Common to Purebred Dogs | PetMD (petmd.com)
  24. The effect of inbreeding, body size and morphology on health in dog breeds | Canine Medicine and Genetics (biomedcentral.com)
  25. What is COI (Coefficient of Inbreeding)? – Embark (embarkvet.com)
  26. Inbreeding coefficient calculator | The Kennel Club (thekennelclub.org.uk)
  27. Inbreeding calculators (COIs) | Dog health | The Kennel Club (thekennelclub.org.uk)
  28. Genetic diversity – managing inbreeding – International Working Dog Registry (iwdr.org)

Lorraine Stehr

Writer

Lorraine Stehr is a seasoned writer with a passion for storytelling. She has honed her craft through years of writing engaging articles that transport readers to new and exciting worlds. With a keen eye for detail and a talent for weaving words into compelling narratives, Lorraine has established herself as a respected voice in the industry.