Dog Poop Contents: What Is the Stuff in My Dog’s Poop?

What else other than color and consistency should you look at when examining your dog’s stool?

Dog Poop Contents: What Is That Covering My Dog's Poop?


Healthy poop should not have any coating on it.

Sometimes you’ll find poop covered by a slimy substance – mucus. Mucus is produced in the intestine to lubricate and protect the gut lining, but it usually isn’t noticeable on feces.

Mucosal surfaces in the gut are part of the immune system, designed to detect and kill pathogenic organisms that may be trying to make their way through the gut lining.

When the large intestine isn’t happy and battling parasites, bacterial overgrowth, food allergy or intolerance, or even tumors (basically anything that irritates or inflames the gut wall), it can increase the production of mucus then becomes apparent on the stool. Even stress can cause mucus-coated stools.

One or two slimy stools don’t warrant rushing to a vet. 

However, if this becomes a regular occurrence, or it comes with other symptoms such as diarrhea, vomiting, or abdominal pain, the situation in the gut has gotten out of control, and it’s essential to have your dog seen by a vet.

Further reading: Mucus in Dog Stool: What Is The Slime in My Dog’s Poop?

What hides within

Like with vomit, the contents of your dog’s stools can sometimes provide clues as to what may have upset your dog’s digestive system.

Pieces of plastic, toys, and other non-food items, tell you that your dog ate stuff that was not intended to be eaten, which could be behind the problem. One question left unanswered, however,  is whether all the foreign material has passed or some remain within the digestive tract.

If you find bits of undigested food, it’s either a reflection on the food or your dog’s ability to digest what they eat. 

Things like pieces of raw carrots can appear in the stools in more or less pristine shape. Dogs are not designed to digest chunks of raw vegetables. Once I tried giving my dog a freeze-dried raw food with chickpeas in it. Chickpeas are nutritious and seem like a good ingredient. However, the chickpea grit came out precisely the same as it went in. Clearly, there wasn’t much nutritional benefit to be gained from feeding something that goes through unchanged.

If the food that dogs should normally digest comes out untouched, you have a serious problem on your hands.

If your dog’s stools look greasy, you might be looking at a condition that prevents the intestinal tract from absorbing nutrients normally (malabsorption).

Smelly poop

Poop does not smell like roses. It’s supposed to be stinky. But some abnormal smells are an indication of a problem.

Food-like, or smelling of sour milk

Poop that smells food-like or of sour milk suggests rapid transit, malabsorption, and/or irritation of the bowel; it can be a sign of overfeeding, particularly in puppies.

Putrid smell

The putrid smell suggests a possible intestinal infection.

Rancid smelling poop

If your dog’s stool smells rancid, it indicates improper digestion of food

When to worry

One bad poop, no bad poop

Bad poops happen, particularly since dogs tend to eat all kinds of things, some of which are not meant to be eaten. If my dogs get a bad poop, I watch for other signs of a problem, such as

  • changes in appetite
  • increased drinking
  • vomiting
  • lethargy
  • or anything else that seems off.

When they look and act fine, and the next poop is the way it should be, I file the event in the back of my mind—or include it in the health chart.

If bad poop develops into diarrhea, I give it 24 hours to resolve. If it doesn’t, or if it becomes severe or accompanied by other signs mentioned above, I see a vet.

Several things affect stool quality, and diet is definitely one of them. In an otherwise healthy dog, it can even be as simple as determining the right amount of dietary fiber for that individual. However, this can be quite a balancing act, particularly in large breed dogs. But before you make any assumptions and start playing with your dog’s diet, see a vet to ensure you KNOW what you’re dealing with.

Fecal samples

Don’t forget the sample.

Your vet can get more information from your dog’s poop than you ever could. Not only do they evaluate all the above aspects, but they can also further analyze it and take a detailed look at what’s in the poop that is hidden from view. (a microscopic fecal analysis)

If you have any concerns, bring a poop sample with you.

Just like with a urine sample, the fresher, the better.

As always, understanding what poop should or should not look like is essential to know when you should see a vet. If you notice consistent abnormalities, see your vet sooner rather than later. It might save you headaches down the road.

Related articles:
Dog Poop Consistency
Dog Poop Color

Further reading:
Assessing Your Dog’s Poop for Signs of Health Problem
6 Things Commonly Found in Your Dog’s Poop

Categories: Dog carePoop

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Jana Rade

I am a graphic designer, dog health advocate, writer, and author. Jasmine, the Rottweiler of my life, was the largest female from her litter. We thought we were getting a healthy dog. Getting a puppy from a backyard breeder was our first mistake. Countless veterinary visits without a diagnosis or useful treatment later, I realized that I had to take Jasmine's health care in my own hands. I learned the hard way that merely seeing a vet is not always enough. There is more to finding a good vet than finding the closest clinic down the street. And, sadly, there is more to advocating for your dog's health than visiting a veterinarian. It should be enough, but it often is not. With Jasmine, it took five years to get a diagnosis. Unfortunately, other problems had snowballed for that in the meantime. Jasmine's health challenges became a crash course in understanding dog health issues and how to go about getting a proper diagnosis and treatment. I had to learn, and I had to learn fast. Helping others through my challenges and experience has become my mission and Jasmine's legacy. I now try to help people how to recognize and understand signs of illness in their dogs, how to work with their veterinarian, and when to seek a second opinion. My goal is to save others the steep curve of having to learn things the hard way as I did. That is the mission behind my blog and behind my writing. That is why I wrote Symptoms to Watch for in Your Dog, which has turned out being an award-winning guide to dog owners. What I'm trying to share encompasses 20 years of experience.

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