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My dog mated with a 5-month-old puppy. Is she pregnant? Belly hard.

Updated On September 23rd, 2025

Pet's info: Dog | Chihuahua | Female | unspayed | 7 lbs

My female dog mated with a male 5 month old puppy in august during heat. Is there any chance that she could be pregnant since her belly is getting harder and she keeps humping the male dog?

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on October 7th, 2017

While male dogs typically do not become sexually mature until at least six to seven months of age, it could be possible that Gizzy is pregnant from this puppy if he became sexually mature early and she was in heat. If she did become pregnant in August, depending on when she mated, she would be pretty far along in her pregnancy (a dog's pregnancy is 58-68). I would have her seen by a vet first thing Monday to diagnose if she is pregnant or not.

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