A dog’s stool can reveal a lot about their health, and noticing mucus in dog poop or worms can be alarming. These symptoms may indicate anything from intestinal irritation to parasitic infections that require prompt treatment.
We outline the possible causes of mucus or worms in a dog’s poop, what you can do at home, and when to seek veterinary help.
Table of Contents
Mucus in Dog Poop or Worms — Why It Happens
When mucus or worms appear in a dog’s stool, it usually points to irritation or infection in the gastrointestinal tract. The intestines naturally produce a thin mucus lining to help with digestion and stool passage, but excess mucus often signals inflammation.
Worms, on the other hand, are parasites that can damage the intestinal lining, steal nutrients, and cause serious illness if untreated.
These signs may be caused by dietary issues, infections, or underlying medical conditions affecting digestion and nutrient absorption.
Mucus in Dog Poop or Worms: Possible Causes
Intestinal Parasites
Worms are one of the most common reasons owners see abnormal stool. Roundworms, hookworms, whipworms, and tapeworms can all appear either as visible segments in feces or through symptoms like weight loss, diarrhea, and mucus in the stool.
The parasites irritate the lining of the intestines, causing inflammation and excess mucus production.
They also compete with a dog for nutrients, leaving them weak and undernourished over time. Left untreated, a heavy parasite load can cause anemia and more severe complications.
Read more: Bloody Mucus in Dog Stool and Vomiting (What it could mean for your dog’s health)
Dietary Indiscretion
Sometimes, dogs eat things they shouldn’t—like spoiled food, garbage, or foreign objects. These irritants can upset the gastrointestinal tract and lead to mucus production. The excess mucus acts as a protective coating as the intestines attempt to rid themselves of the offending material.
While this may cause only temporary discomfort, repeated exposure or ingestion of toxins can lead to chronic irritation, diarrhea, and possible infection that worsens stool quality.
Inflammatory Bowel Disease (IBD)
Dogs with IBD experience chronic inflammation of the intestinal lining. This inflammation disrupts digestion and often produces mucus-filled stools. In some cases, dogs may strain to pass stool or produce diarrhea mixed with blood and mucus.
The condition requires long-term management, as it does not resolve on its own. IBD can cause ongoing weight loss, nutritional deficiencies, and discomfort if left untreated.
Bacterial or Viral Infections
Pathogens like Salmonella, E. coli, or canine parvovirus can cause severe gastrointestinal upset. One of the hallmark signs of infection is diarrhea with mucus and, in some cases, visible worms if the dog has a concurrent parasitic infection.
Infections are especially dangerous in puppies and older dogs with weaker immune systems. They can lead to rapid dehydration, blood in the stool, and systemic illness requiring urgent care.
Stress or Sudden Diet Changes
Stressful situations—like boarding, moving, or the introduction of a new pet—can affect the digestive tract. Similarly, a sudden switch in diet may upset the balance of gut bacteria, leading to loose stools and mucus.
Although stress-related cases may resolve quickly, persistent symptoms should not be ignored, especially if worms or blood are also present.
Food Intolerances or Allergies
Some dogs develop sensitivities to ingredients such as chicken, beef, dairy, or grains. These sensitivities can cause inflammation in the intestines, resulting in diarrhea with mucus or changes in stool consistency.
Chronic food intolerances may look similar to IBD and often require veterinary testing to confirm. An elimination diet may be recommended to identify the trigger ingredient.
What to Do If Your Dog Has Mucus or Worms In Their Poop
If you notice mucus in your dog’s stool or suspect worms, start by monitoring their overall condition. Keep track of appetite, energy levels, frequency of stool changes, and any additional symptoms like vomiting or weight loss.
Make sure your dog has access to fresh water to prevent dehydration. If diet may be the culprit, consider whether a recent change in food or treats could be responsible. Transition foods gradually to avoid upsetting the digestive system.
Over-the-counter dewormers should only be used under veterinary guidance, since the wrong medication may not target the correct type of parasite. Collecting a stool sample for your vet can help confirm the cause.
In mild cases caused by stress or a minor dietary upset, symptoms may resolve in a day or two. However, persistent mucus or visible worms in stool require professional care.
When to Call or Visit Your Vet
Seek veterinary attention if mucus or worms persist for more than 48 hours, or if your dog shows additional warning signs. Blood in the stool, frequent diarrhea, vomiting, or loss of appetite are all red flags.
Puppies, senior dogs, or those with compromised immune systems should see a vet promptly at the first sign of worms or mucus in their stool. These dogs are more vulnerable to dehydration and rapid health decline.
Emergency care is needed if your dog appears lethargic, refuses to eat or drink, or produces black, tarry stools that may indicate internal bleeding. A veterinarian can perform fecal tests, prescribe appropriate dewormers, and recommend treatment for infections or chronic digestive conditions.
Read more: Mucus Dog Poop Like Jelly with Blood (Why this happens)
Key Takeaway
Finding mucus in dog poop or worms is concerning, but it is not uncommon. The causes range from minor irritations to more serious infections or chronic digestive disorders.
Monitor your dog closely, ensure they stay hydrated, and contact a veterinarian if symptoms persist or worsen. With timely care, most causes of mucus or worms in stool can be managed successfully, helping your dog return to comfort and good health.