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My dog bites strangers/vet. How to fix aggression & get Petco shots?

Updated On September 23rd, 2025

Pet's info: Dog | American Staffordshire Terrier | Male | neutered | 1 year and 3 months old | 79 lbs

Last year I took my dog to petco vaccination clinic to get his shots but a couple months ago he had to go to vet and they put a muzzle on him for the first time he didn't like it since then when ever outside a stranger goes to pet him he tries to bit without warning same with if the vet gets to close to him how do I go about fixing this problem and will petco still give him his shots or how do I at least go about getting his rabies cause I can give him his vaccines he lets me do whatever!

1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on February 4th, 2019

It’s pretty common for dogs to start to show signs of fear towards strangers and at the vets office around 6-12 months of age, and I doubt the muzzle had anything to do with it. Biting without giving warning signs is scary behavior and it would be best to see a behaviorist to try to work on this. He absolutely should wear a muzzle at the vets and it may be a good idea to train him to wear a basket muzzle out in public to keep strangers safe. You can purchase a muzzle and put it on at home or in the car before arriving at the vets to reduce stress, and you may want to ask your vet about a sedative before the visit. Some dogs need heavy sedation for vaccines and exams to help prevent them from becoming even more fearful at the vets office. While a Petco vaccine clinic might be an option they would also need to use a muzzle and would not be able to prescribe sedation if necessary. https://bestfriends.org/resources/muzzles-tool-keep-everyone-safe

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