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Why is my 8-month puppy's vulva and nipples swollen? Is she in heat?

Updated On September 23rd, 2025

Pet's info: Dog | Chihuahua | Female | unspayed | 7 months and 10 days old | 2.5 lbs

My 8 month old puppy has a swollen vagina and nipples. Ive never had a dog so i dont know what is happening. Is she in heat?

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1 Answer

Most Helpful Answer

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Answered By Lindsey Edwards MVB, BSc, IVCA

Veterinarian

Published on April 4th, 2019

With that degree of swelling she is very much in heat and must be kept isolated from all other dogs (if she has been out in the last few weeks it is possible she may have been mated already). I would contact your vet to discuss options if you do not want pups and there is any possibility she may have been mated

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