As Amazon Associates, we may earn from qualifying purchases. See disclosure in sidebar.

Pictures of Mucus in Dog’s Stools, With Veterinarian Comments

Score for Seniors:
Activity Level:
Weight: Pounds

collage of pictures showing mucus in dog stools

This article was updated on May 5th, 2023

One common question that dog owners ask vets is: Why does my dog’s stools have a shiny, slimy, jelly-like material on it? Well, that material is actually mucus. Mucus exists in different parts of the body, and in the gastrointestinal tract, mucus has an extremely important role for gut health.

In this article, we will review several pictures of mucus in dog’s stools. Our hope is that it helps you understand what may be going on, if you have recently seen mucus in your dog’s stools. Naturally, you should always consult with your veterinarian to ensure correct testing, diagnosis and treatment.

Example picture 1: White mucus

This sort of mucus can be compared to slim or snot, and may coat the outside of the stool, giving it a glossy appearance. It is often accompanied with loose or unformed stool.

Potential causes for this color mucus include colitis (gut inflammation), food allergies, or Inflammatory Bowel Disease (IBD). Unfortunately, mucus in the stool is not a very specific sign and simply tells us that the lower gut is inflamed; but not why!

It can help to offer your dog a bland diet of chicken and rice, to settle the gut. It is also a good idea to start them on a probiotic anti-diarrhea paste.

Example picture 2: red or bloody mucus

Red is often present with a large amount of mucus, as seen on the pictures below.

This often means that there is inflammation in the large intestine, due to reasons from stress to dietary indiscretion to parasitic or bacterial infections. A veterinary visit is recommended in this case. Fresh red blood originates in the lower gut (colon), while black or tarry blood is from the stomach or small intestine. The blood turns a black color due to the blood being digested.

The presence of blood is a concern and warrants an urgent vet visit. In young puppies, particularly those who have not yet been vaccinated and de-wormed, this could be a sign of Parvovirus or hookworm. Learn more about Blood & mucus in dog’s poop.

Example picture 3: yellow or white mucus

Yellow mucus in dog’s poop can result from changes in digestion due to liver problems. If ongoing and with other symptoms, discuss with your veterinarian. When the mucus is yellow and the stool is yellow or white, we need to be looking at the liver or gallbladder as potential causes.

Yellow mucus in dog poop

If the dog does have liver disease, we may notice other signs such as nausea, weight loss and jaundice. This is something we should see the vet about right away, and they can get to the bottom of the issue by running some diagnostic tests such as a liver function blood test and an abdominal scan.

Remember that the appearance of your dog’s stools is only one factor that your veterinarian may take into consideration. While these pictures of mucus may help you understand what might be going on with your dog, it is important to discuss your particular situation with your veterinarian. Learn more about mucus in a dog’ stools.

Related posts:

header image showing various mucus colors Yellow, Green, or White Mucus in Dog Poop: What Mucus Colors Can Tell You - Occasionally in practice, I’d encounter a dog with colored mucus in the poop. In treating the various cases, I learned… [...]
owner picking up after the dog with a plastic bag on grass in the park Mucus in My Dog’s Diarrhea: What Should I Do? [Vet Advice] - “Doc, my dog’s poop is covered with slime, should I be worried?” - a concerned pup's parent recently asked me… [...]
lethargic dog laying on floor Blood and Mucus in Dog’s Poop or Diarrhea [Vet Advice + Pictures] - As a veterinarian, I have occasionally seen dog owners who were concerned because their pooch had blood and mucus in… [...]
owner picking up after the dog at the park Yellow Mucus In Dog Poop: A Vet Shares What to Do - Keeping an eye on your dog’s poop colors can be one of the most important things you do for their… [...]
owner picking up dog's poop in park Is Mucus in a Dog’s Poop a Problem? How to Help Your Dog - Since we all have to pick up our dogs’ poop at one point or another, it’s likely fair to say… [...]


  • Dr. Linda Simon, Veterinarian

    Dr Linda Simon (MVB MRCVS) has 10 years of experience as a veterinarian. She is a veterinary surgeon with a special interest in geriatric patient care, dermatology and endocrinology. She is a member of the British Royal College of Veterinary Surgeons. She graduated top of her class from UCD School of Veterinary Medicine in Dublin in 2013. Linda has also worked as a locum vet in a range of clinics, including 24 hour emergency clinics and busy charity clinics.

Be the first to comment

Leave a Reply

Your email address will not be published.


This site uses Akismet to reduce spam. Learn how your comment data is processed.