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Can a neutered dog breed?

Species: Dog
Breed: chihuahua
Age: 2-5 years
Hi, I have a 2 year old chihuahua weighs 4 pounds named Frenchy Fry. I nuetered him when he was 10 months old. He is still mating with my female chihuahua multipe times and still producing sperm. Can he impregnate her? Could something have gone wrong with the surgery so that he is not fully fixed?
Thanks.

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Online vet, Dr. Marie

Dr. Marie replied:

There's no way that this little guy can be producing sperm if he has been neutered. In order to make sperm he has to have testicles, and neutering removes the testicles.

Neutered dogs can get an erection though. This is because there is still some testosterone that can be produced by the adrenal glands. There are some neutered dogs that can still penetrate a female as well. But, he won't be able to get her pregnant.

It's possible that you are seeing some ejaculate fluid, but again there won't be any sperm there.

Ideally, it would be a great idea to have your female spayed!

---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.

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