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Why is my male dog suddenly sniffing my female dog's butt?

Updated On September 23rd, 2025

Pet's info: Dog | Chihuahua | Male | unneutered | 1 year and 4 months old

He keeps sniffing my shitzu ladies butt? Normally they ignore each other but yesterday he sniff her but once and walked away and today he keeps following her while sniffing her butt normally he acts like she doesnt exist so this is really suprising why is he doing it all of a sudden ps I got lady a little over 3 months ago

1 Answer

Most Helpful Answer

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Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on February 16th, 2018

It is possible that your female is going into heat and he is interested. I have also noticed dogs become very interested in females when they have a urinary tract infection. I would encourage you to have her evaluated by your veterinarian soon. If she is in heat and you don’t want a pregnancy you should devise a plan to keep them separate. Best of luck and thank you for using Pet Coach.

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