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Is it normal for my dog to have one testicle bigger than the other?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | unneutered | 11 years and 1 month old | 20 lbs

Are my dogs Testicles normal or is there something wrong? They feel fine like two balls inside of them. One is a little bit bigger than the other one My dog doesn’t act any different than normal Still eats drinks plays poops pees sleep

2 Answers

Most Helpful Answer

Andrea M. Brodie, DVM

Answered By Andrea M. Brodie, DVM

Veterinarian

Published on February 22nd, 2018

It certainly looks like your dog has completely normal and healthy testicles, as far as I can possibly say without palpating them. It is quite normal that one testicle is a little bit bigger than the other. The skin looks normally pale pink, ie not red and inflamed, and the scrotum appears to have normal hair.
So, I do not think you have to worry about Bear's testicles being abnormal or diseased.
Vote Icon7Pet Parents found this answer helpful

Related Answers from Veterinarians

  • Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on August 19th, 2018

    Hi Arden! From the pictures, it doesn't look like one testicle is much bigger than the other. They should be approximately the same size, but one can be a bit bigger than the other. I hope this helps!

    Vote Icon

    1Pet Parents found this answer helpful

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Vet Q & A
What do normal dog testicles look like? When should I see a vet?
Yes, they appear fairly normal, but I would have to examine them closer and palpate them in order to ensure that everything is normal. If there is a concern, then it's best to have him examined by a vet. I hope that helps and all is well with Bear.
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Vet Q & A
My dog has uneven testicles. Should I be concerned about a tumor?
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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New Pet
My 6-week-old puppy has one testicle larger. Should I worry?
That's hard to say without being able to examine and monitor the testicles. It's possible this is congenital. If Digby is not a breeding dog, an undeveloped testicle is not a big concern (though I do recommend to have him neutered). A less common cause of a size difference is a torsion or infection. A veterinarian can get an idea of what is happening with an exam. I hope this helps.
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Health & Wellness
My dog's testicles are black, big, and hanging low. Is it normal?
The picture does not show anything concerning but I would continue to monitor for any sweliing or discomfort which may indicate a painful infection or assymetry which can indicate a tumour. Rapid increase in size can occur with scrotal hernias which although rare are a surgical emergency.
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Is the skin and texture of my unneutered dog's testicles normal?
It is really hard to tell by pictures if skin is normal. I think based on the photo that Ludo does have normal testicles. The testicles can have some pigment on them. However at anytime Ludo is not acting normal, itching, abnormal urination or not eating I would recommend taking him to a vet to have them checked in person. hope that helps
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My pug's testicle looks pear-shaped. Should I take him to the vet?
This is may be normal but it's impossible to know without palpating the area. Palpate both testicles at the same time. If they feel like they are different sizes, different temperatures, different shapes or seem painful, I recommend to have him examined by his veterinarian. I hope this helps.
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Should I worry about my dog's purple scrotum or testicle placement?
What you may be seeing is his bulbus glandis. They are two glands located at the base of the penis on both sides. They function during mating to effect the tie while mounting a female. This is normal and likely no cause for concern. The pigmentation of his scrotum may also be normal. You can have him seen by your veterinarian to discuss any concerns regarding either.
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