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 my senior dog coughing blood and sleeping a lot?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 15 years and 9 months old | 75 lbs

My dog has been clearing his throat loudly since last night and he just coughed and a tiny bit of bloody mucous came out. He's also been sleeping a lot since yesterday.

1 Answer

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on May 21st, 2017

Oh no, poor Marble! It is concerning that he coughed out some blood mucous and while that can be a sign of respiratory infection, in a senior dog I would also be concerned that it could be a sign of cancer. It's best that he is seen by a vet tomorrow for a physical exam, blood tests, urinalysis, and chest x-rays. These tests will help the vet diagnose what is causing his symptoms. Once a diagnosis is reached, the vet can discuss what treatment options are available for Marble.
Vote Icon2Pet 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