Petco Text Logo
Petco Pet Logo
  • Two Easy Ways to Start Earning Rewards!

    rewards header
    Become a member today!
    Members-only pricing and offers, personalized care notifications, Vital Care points back on every purchase and more!
    Petco Pay LogoBecome a credit card member today!

    Earn 2X Pals Rewards points at Petco
    when you use Petco Pay!

    APPLY NOW
    Learn More About Petco Pay Benefits

Why is there brown goo that looks like blood on my dog's diaper?

Updated on September 23, 2025

Pet's info: Dog | Maltipoo | Female | spayed | 18 years and 2 months old | 11 lbs

My dog wears diapers and today I found a bit of brown goo, what looked like to be blood, on her genital. My dad said when he changed her that he didn’t notice anything other than pee on her diaper, and she is not secreting it either. There is no leakage that I can see either. I’m not sure what it could be. She is eating normally and drinking water as usual. Any ideas of what it could be?

1 Answer

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on January 8, 2021

I see what you mean in the picture. It doesn't look like blood to me, but it could be when you look closer. It may be Brandy has a little blood in her poop, which could be due to a stomach illness or eating something rotten. It could also be an indication of an anal sac issue. Given that it's quite a small amount and she is otherwise normal, I'd keep an eye on her for now. If she keeps having this in her diaper, then I would have it checked out by a vet. I hope this helps.
Vote Icon1Pet Parents found this answer helpful

Smart Picks for Smart Questions

Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Share

Styled arrow button