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Why is my dog suddenly growling and barking for no apparent reason?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 1 year and 9 months old | 28 lbs

Duke has had no change in any of his surroundings but the past 3-5 hours, he is growling and barking every few minutes. Not looking at anything in particular and not aggressive towards us while he’s growling (so far). Any idea of what this could be? Only thing that soothes him to stop is petting him which I’m doing to calm him down. My first thought was losing eye sight but really not sure. Otherwise he’s fine.

1 Answer

Most Helpful Answer

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Answered By Rodrigo Roca, DVM

Veterinarian

Published on January 14th, 2018

Hello, Duke may be hearing or sensing something that could be causing him to be alarmed. If nothing, then make sure Duke did not get into any medications at home that could alter his mentation. If this does not change and he continue to show this behavior then have Duke evaluated by a veterinarian soon. I would have Duke evaluated tonight if his behavioral changes worsen or if you note any other signs including weakness, lethargy, vomiting, diarrhea, or worsening aggression. Hope this helps and best of luck.

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