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My puppy growls and barks aggressively at people and dogs. What to do?

Updated On September 23rd, 2025

Pet's info: Dog | Scottish Terrier | Male | unneutered | 3 months and 30 days old | 13 lbs

We've been noticing that our 4 month old Scottie pup is showing a bit of growling/barking in an aggressive tone when he first comes across neighbors , other dogs etc. We certainly don't want this to turn into a constant or aggressive behavior. We just had to put down our 7 year old scottie in Nov, and he was the most delightful and friendly dog we have ever owned. Everyone loved our boy and we want this new little boy to be welcomed and friendly with everyone he meets. Any suggestions?

2 Answers

Most Helpful Answer

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Answered By Stacey Anstaett, DVM

Veterinarian

Published on January 1st, 2019

At his age, it may be fear aggression that is driving the behavior. The more you can socialize him and reward appropriate behavior from him the better. Here is an article with great advice on doing just that. https://www.animalhumanesociety.org/behavior/socializing-your-dog Here's some great information about aggression in dogs, explaining the different types of aggression, and giving you advice on how to help the behavior. https://www.aspca.org/pet-care/dog-care/common-dog-behavior-issues/aggression Good information on introducing dogs: https://www.humanesociety.org/resources/introducing-new-dogs I hope thats helpful for you! I'm sorry for your recent loss, and I hope Laddie III brings you all joy for many years to come. Thank you for asking PetCoach!

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    Answered By Ana M, DVM

    Veterinarian

    Published on April 10th, 2019

    Thank you for submitting your question regarding Oscar. The growling does indicate aggression. In the situation you described it typically results from fear. This can be impacted by genetics, but is most commonly the result of poor or inadequate socialization as a puppy. A puppy's socialization window is roughly from 8-14 weeks of age. During this time frame, the puppy needs to have many new and positive experiences to prepare him to be well adjusted in adulthood. It is worth seeking out some training classes for him. You will also want to consult with his veterinarian to rule out any medication issue affecting his behavior. I hope this information helps!

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