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Inbreeding dogs.

Species: Dog
Breed: yorkie terrier
Age: 5-8 years
is it true that if a female dog and her son have a relationship will the puppies come out more pure or will it be a problem?




Online vet, Dr. Marie

Dr. Marie replied:

It is really not a good idea to breed a mother and son dog. The reason for this is because of possible genetic defects. Let's say mom is carrying some defective genes. If we breed her to an unrelated dog, then the chances of these genes being expressed are smaller. But, if mom has these genes, then there is a high possibility that the son has them as well. When you breed the two of them together then the chances of those defective genes being expressed is double.

So, breeding a dog with her son gives you a much higher chance of producing puppies with birth defects.



---This question was asked in our Ask A Vet For Free section.---


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Dr. MarieDr. Marie is a veterinarian who practices in a busy animal hospital in Ottawa, Ontario. She created Ask A Vet Question as a resource for good, accurate veterinary advice online. Dr. Marie treats dogs, cats, hamsters, guinea pigs, and rats. She has been a vet since 1999.

Is an online vet visit just as good as a trip to your veterinarian? No! But, many times, asking an online veterinarian a question can help save you money. While Dr. Marie can't officially diagnose your pet or prescribe medications, she can often advise you on whether a vet visit is necessary. You can also ask Dr. Marie for a second opinion on your pet's condition.