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Why is my unspayed dog lactating, nipples swollen, and howling?

Updated On September 23rd, 2025

Pet's info: Dog | Mastiff | Female | unspayed

I have noticed today as I was giving my dog a belly rub that she is lactating from one nipple and they have gone rather large and swollen looking she has had only two seasons and has NOT been mounted by another dog as she is only about 17 months only she is an American bullmastiff and she has also started to howl which is new for her is there anything u can advise me on or anything to help ??

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on January 11th, 2017

It is possible that Bella is heading into another heat. While dogs typically go into heat every six months, they can go into heat sooner, and it's a possibility if her last heat was a few months ago. She could also be experiencing a false pregnancy if there's no chance she would be pregnant. I would have her seen by a vet in the morning for a definitive diagnosis as to why she is experiencing these symptoms.

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