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My dog became aggressive on Cosequin for joints. Is this normal?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | spayed | 11 years and 1 month old | 47 lbs

My vet recommended Cosiquin for my dogs joints, however after giving the recommended dose for a few days she gets aggressive with the other dogs. Is this normal? I've stopped it she seems better.

1 Answer

Most Helpful Answer

Jessica Desrosiers

Answered By Jessica Desrosiers

Veterinary Technician

Published on June 30th, 2023

That is not normal. Changes in pain can sometimes lead to aggressive behavior, however, this medication should help reduce pain, instead of increase it. I would speak with your regular veterinarian to try an alternative to the cosequin, such as a different joint supplement, or one that uses other ingredients like MSM or fish oil rather than glucosamine and chondroitin.
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