· 9 min read

Can Dogs Get Worms from Eating Cat Feces? The Surprising Risks Every Pet Parent Should Know

Picture this: You’re scrolling through your phone, enjoying a quiet morning, when suddenly you hear a rustle from the bathroom. You rush over to find your dog—tail wagging, nose covered in litter—chewing something… unmentionable. Yep, your pup just raided the cat’s litter box. Panic sets in: Did they just get worms? Is this dangerous? Why on earth do they find that appealing?!

If you’ve ever dealt with a “litter box bandit” dog, you’re not alone. This common (and gross) behavior, called coprophagia, leaves many pet parents worried about their dog’s health—especially when it comes to parasites like worms. Today, we’re diving into the big question: Can dogs get worms from eating cat feces? Spoiler: The answer is yes, and the risks might surprise you. We’ll also cover why dogs do this, how to stop it, and what to do if your dog has already indulged. Let’s keep your pup safe (and your litter box off-limits!).

can dogs get worms from eating cat feces

Table of Contents

  1. Can Dogs Get Worms from Cat Feces? The Short Answer
  2. Why Do Dogs Eat Cat Feces, Anyway?
  3. The Risks: Worms and Beyond
  4. Myth Busted: Are There “Benefits” to Dogs Eating Cat Feces?
  5. How to Stop Your Dog from Eating Cat Feces
  6. Healthier Alternatives to Satisfy Their Curiosity
  7. FAQ: Your Top Questions Answered
  8. Conclusion: Keep Your Pup (and Litter Box) Safe
  9. References

Can Dogs Get Worms from Cat Feces? The Short Answer

Yes, dogs can absolutely get worms from eating cat feces.

Here’s why: Cats, like dogs, can carry intestinal parasites (worms) that shed their eggs in feces. When a dog eats that feces, they ingest the eggs, which then hatch and grow in the dog’s intestines. Some worms, like roundworms, are especially adept at spreading this way. Even indoor cats can carry these parasites, so no litter box is “safe” from this risk.

But worms aren’t the only concern. Cat feces can also contain bacteria, viruses, or other pathogens that make your dog sick. Let’s break down why this behavior is more than just a gross habit—it’s a health hazard.

Why Do Dogs Eat Cat Feces, Anyway?

Before we dive into the risks, let’s tackle the million-dollar question: Why would my dog eat something so… unappetizing?

Coprophagia (the fancy term for eating feces) is surprisingly common in dogs, and there are a few reasons behind it:

  • Taste and Smell: Cat food is high in protein and fat, which makes their feces smell (and taste, to a dog) more appealing than, say, a dog’s own waste. To your pup, it might even smell like a “treat.”
  • Instinct: Mother dogs lick their puppies’ feces to keep the den clean—some adult dogs retain this instinct.
  • Nutritional Deficiencies: In rare cases, dogs with malabsorption issues or deficiencies (like enzymes or vitamins) might seek out feces as a way to “supplement” their diet. If this is the case, your vet can help address the root cause.
  • Boredom or Anxiety: Dogs left alone for long periods or feeling stressed might turn to coprophagia as a form of entertainment or comfort.
  • Curiosity: Puppies, in particular, explore the world with their mouths—litter boxes are just another “toy” to investigate.

Whatever the reason, the behavior is fixable (we’ll get to that later!). But first, let’s focus on why it’s so important to stop it: the risks.

The Risks: Worms and Beyond

Eating cat feces isn’t just gross—it’s a shortcut to a host of health problems for your dog. Let’s start with the biggest threat: worms.

Roundworms: The Most Common Threat

Roundworms (Toxocara cati in cats, Toxocara canis in dogs) are the top culprit here. Cats often pick up roundworms from contaminated soil, rodents, or infected mother’s milk. These worms lay eggs that pass through the cat’s feces, where they can survive in the environment for years.

When your dog eats the feces, they swallow these eggs. Once inside, the eggs hatch into larvae, which migrate through the dog’s body (often to the lungs, liver, or intestines). Adult roundworms then grow in the intestines, stealing nutrients and causing issues like:

  • Vomiting (sometimes with visible worms)
  • Diarrhea
  • Bloated belly (especially in puppies)
  • Weight loss
  • Lethargy

In severe cases, roundworms can block the intestines, which is life-threatening. Puppies and senior dogs are most at risk, but even healthy adult dogs can get sick.

Hookworms: Tiny but Dangerous

Hookworms (Ancylostoma spp.) are another parasite cats and dogs share. These tiny, hook-shaped worms attach to the intestinal wall and feed on blood. Like roundworms, their eggs are shed in feces.

If your dog eats cat feces with hookworm eggs, the larvae can enter through the mouth or even through the skin (if they walk on contaminated soil). Symptoms include:

  • Anemia (pale gums, weakness)
  • Dark, tarry stool (from blood loss)
  • Itchy paws or skin (if larvae enter through the skin)
  • Diarrhea

Hookworms are especially dangerous for puppies, as severe blood loss can lead to organ failure.

Tapeworms: Less Likely, but Still a Risk

Tapeworms are a bit trickier. Dogs typically get tapeworms from eating fleas (which carry tapeworm larvae), but can they get them from cat feces? It’s possible, but less common.

Cats with tapeworms shed egg packets (called proglottids) in their feces. These look like tiny, rice-like grains. If a dog eats these proglottids, the larvae can develop into adult tapeworms in their intestines. Symptoms include:

  • Visible proglottids in feces or around the anus (they might look like sesame seeds)
  • Itching around the rear
  • Weight loss (in severe cases)

While tapeworms aren’t as immediately dangerous as roundworms or hookworms, they still require treatment.

Other Pathogens: It’s Not Just Worms

Cat feces can harbor more than just worms. Here are other risks to watch for:

  • Toxoplasmosis: Caused by the parasite Toxoplasma gondii, which cats (the definitive host) shed in their feces. While dogs rarely get sick from toxoplasmosis, severe cases can cause neurological issues or eye problems. Pregnant women are also at risk if they handle contaminated litter, so keep that in mind for your household!
  • Bacteria: E. coli, Salmonella, and Campylobacter are all found in feces and can cause vomiting, diarrhea, or fever in dogs.
  • Viruses: Rare, but some viruses (like parvovirus) can survive in feces. Puppies without full vaccinations are most vulnerable.

Myth Busted: Are There “Benefits” to Dogs Eating Cat Feces?

You might have heard rumors like, “Cat feces has fiber or potassium that’s good for dogs!” Let’s set the record straight: There are NO nutritional benefits to dogs eating cat feces.

Cat feces is waste—by the time food passes through a cat’s digestive system, most nutrients are absorbed. What’s left is indigestible matter, bacteria, and (worst of all) parasite eggs. Even if your dog seems to “like” it, there’s no upside to letting them indulge. The risks far outweigh any perceived “plus.”

How to Stop Your Dog from Eating Cat Feces

The good news? You can train your dog to leave the litter box alone. Here are actionable steps:

1. Keep the Litter Box Out of Reach

This is the easiest fix! Place the litter box in a location your dog can’t access:

  • Use a baby gate to block the bathroom door.
  • Try a covered litter box with a small entrance (too small for your dog to stick their head in).
  • Place the box on a high surface (like a counter or shelf) if your cat can jump.

2. Clean the Litter Box Daily

The less feces in the box, the less temptation for your dog. Scoop at least once a day—your cat will thank you too!

3. Train the “Leave It” Command

Teach your dog to ignore the litter box with a solid “leave it” command. Start with treats: Hold a treat in your hand, say “leave it,” and close your fist. When they stop trying to get it, reward them with a different treat from your other hand. Practice with low-value items first, then work up to the litter box.

4. Address Underlying Issues

If your dog is eating feces due to boredom, anxiety, or a nutritional deficiency:

  • Increase exercise and mental stimulation (puzzle toys, training sessions).
  • Talk to your vet about switching to a high-quality, balanced diet.
  • Rule out medical issues like malabsorption or enzyme deficiencies with a checkup.

5. Use Deterrents (Carefully!)

Some pet parents use bitter-tasting sprays (like Bitter Apple) on feces to deter dogs. Just make sure the spray is safe for cats—avoid anything with essential oils or harsh chemicals. Always test a small amount first!

Healthier Alternatives to Satisfy Their Curiosity

If your dog is obsessed with “snacking” from the litter box, they might be craving something specific. Try these safe alternatives:

  • High-Protein Treats: Since cat feces smells like protein-rich cat food, offer freeze-dried chicken or beef treats instead.
  • Interactive Toys: Keep their brain busy with puzzle toys stuffed with peanut butter (unsalted, no xylitol) or kibble.
  • Fresh Fruits/Veggies: Carrots, blueberries, or apple slices (no seeds) make crunchy, low-calorie snacks.
  • Probiotics: If they’re drawn to feces due to gut health issues, ask your vet about a dog-safe probiotic supplement.

FAQ: Your Top Questions Answered

Q: My dog ate cat feces—should I panic?

A: Probably not, but monitor them closely. If they show symptoms like vomiting, diarrhea, or lethargy, call your vet. Puppies, seniors, or immunocompromised dogs should see a vet immediately.

Q: How long does it take for worms to show up after my dog eats cat feces?

A: It depends on the worm. Roundworm eggs can take 2–4 weeks to hatch into adult worms. If you suspect exposure, your vet can test for parasites with a fecal exam.

Q: Can my indoor-only cat still have worms?

A: Yes! Indoor cats can get worms from contaminated soil (brought in on shoes), bugs, or even from you if you handle infected animals. Regular deworming (as recommended by your vet) is key for both cats and dogs.

Q: Will deworming medication protect my dog if they ate cat feces?

A: Dewormers treat existing worms, but they don’t prevent infection. If your dog ate feces, ask your vet if a dewormer is necessary based on their risk.

Q: Is coprophagia a sign of a behavioral problem?

A: Not always. It can be instinctual, nutritional, or due to boredom. But if it’s excessive (multiple times a day), talk to a certified dog trainer or behaviorist to rule out anxiety or compulsive behavior.

Conclusion: Keep Your Pup (and Litter Box) Safe

While it’s a gross habit, dogs eating cat feces is a common issue with a simple solution: prevention. By keeping the litter box out of reach, addressing underlying causes, and offering healthy alternatives, you can protect your dog from worms and other pathogens.

Remember, if your dog does indulge, don’t panic—just monitor them and consult your vet if you notice any symptoms. Regular checkups, deworming, and open communication with your vet are the best ways to keep your pup happy and healthy.

Here’s to a litter box-free menu for your dog! 🐾

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