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Possible silent heat.

Species: Dog
Breed: great dane
Age: 1-2 years
She went into heat last year in August for the first time. She has not gone into heat since then. I was under the impression it was every 6 months or so, and I'm sure dogs vary, but 9 months seems long. Should we take her in?


Online vet, Dr. Marie

Dr. Marie replied:

Hi and thanks for your interesting question.

While most dogs have a 6 month interval between heat cycles, not all of them do. Some dogs can definitely go 8 or 10 months. So, my first thought is that you will see a heat within the next month or so.

It's also possible that she had something called a silent heat. Some dogs can have a heat cycle where they don't show any outward signs. These dogs have no swelling or discharge. However, if there is an unneutered male dog around they will still be really interested in her if she is in a silent heat.

I wouldn't be too worried at this point. If she goes another few months without a heat, it's worthwhile to have your vet do a good exam on her and some bloodwork. But, I would be very surprised if there was anything wrong with her.



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Disclaimer: Although Dr. Marie is a qualified veterinarian, the information found on this site is not meant to replace the advice of your own veterinarian. AskAVetQuestion.com and Dr. Marie do not accept any responsibility for any loss, damage, injury, death, or disease which may arise from reliance on information contained on this site. Do not use information found on this site for diagnosing or treating your pet. Anything you read here is for information only.

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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.