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My dog has uneven testicles. Should I be concerned about a tumor?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male

My dogs testicles are different sizes one is small the other is huge should I be worried, I have read online about testcle tumors could it be that.

4 Answers

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on March 17th, 2016

Yes, your dog's testicles should be approximately the same size. One can be a tiny bit smaller, but there should not be a huge difference. Your dog needs to be seen by a veterinarian as he could have a testicular tumor, a testicular torsion, an abscess or orchitis or brucellosis. Please take him to a vet ASAP.

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60Pet Parents found this answer helpful

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    Answered By Angel Alvarado, LVT

    Licensed Veterinary Technician

    Published on July 3rd, 2018

    It is not uncommon for a young dog to have uneven testicles. Typically, the smaller one will "catch up" in a few months. Monitor them and see your veterinarian if one is significantly larger or smaller in a month or two. If Meeko is to be neutered (recommended), it won't matter.

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    23Pet Parents found this answer helpful

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    Answered By Lindsey Edwards MVB, BSc, IVCA

    Veterinarian

    Published on December 19th, 2017

    Pictures can be deceiving and I recommend you get it checked by your vet if you feel anything has changed in size or shape. They appear symmetrical and normal in shape in the photo, the lumps are likely to be the epididymis which is attached to the testicle

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    7Pet Parents found this answer helpful

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on October 13th, 2018

    From the picture, Danny's testicles look normal to me. Check out this Pet Coach article which discusses testicular cancer in dogs, and lists the signs of it. Best of luck. https://www.petcoach.co/article/testicular-cancer-in-dogs/

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    4Pet Parents found this answer helpful

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