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Why is my male dog peeing inside after a new female dog arrived?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | unneutered | 2 years and 9 months old | 13 lbs

What can I do? My 2 yr old male dog who's been housebroken for 1 and half years now suddenly started peeing all over my house only after my daughter bought home a female dog and she has been here about 3 weeks.

1 Answer

Most Helpful Answer

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Answered By Britni Miller, DVM

Veterinarian

Published on July 1st, 2017

This is likely a behavioral issue that will be a hard habit to break. He is probably being territorial, and being intact will increase his behaviors. You can try neutering him, removing the female, or confining him when he cannot be monitored.

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