How To Tell if Your Dog Has Worms: Symptoms, Treatment, and Prevention

If you've found yourself asking, "Why is my dog scooting across the floor?" or "What’s that in their poop?", you're not alone. Parasites like worms are surprisingly common in dogs, and while the topic isn’t exactly dinner-table friendly, it’s one every pet parent needs to understand.

According to the Centers for Disease Control and Prevention (CDC), intestinal parasites affect a significant portion of the pet population—especially puppies, shelter dogs, and outdoor explorers. And unfortunately, worms don’t always make themselves obvious right away.

The good news? Most worm infestations are treatable and preventable, especially when caught early. In this guide, we’ll break down:

• The telltale signs your dog might have worms
• What different types of dog worms look like
• How your pup might’ve picked them up
• What to do (and feed) to keep your dog protected

How to Tell if Your Dog Has Worms (Common Symptoms)

Dogs can be incredibly stoic, even when they’re uncomfortable. That’s why it’s important to look for subtle signs that something’s off.

Here are the most common symptoms that may indicate your dog has worms:

Symptoms to Watch For:

• Visible worms or eggs in poop or vomit (often white, stringy, or rice-like)
• Scooting or dragging their rear across the floor
• Excessive licking or biting near the tail or rear
• Pot-bellied appearance, especially in puppies
• Weight loss, even with a normal appetite
• Diarrhea or vomiting
• Dull coat, hair loss, or itchy skin
• Lethargy or decreased energy
• Coughing (can occur with roundworms or hookworms in advanced cases)

Remember: Some dogs show no symptoms at all—especially in early stages. That’s why regular fecal tests and checkups are so important.

What Do Dog Worms Look Like?

You may not want to know, but being able to recognize worms can help you get your dog the help they need faster. Here's a breakdown of what different dog worms look like if you happen to spot something suspicious.

Common Types of Visible Worms:

• Roundworms:
  • Long, white or tan
  • Look like spaghetti
  • Can appear in vomit or poop
• Tapeworms:
  • Flat and segmented
  • Resemble grains of rice near the anus or in stool
  • Segments may wiggle when freshly passed
• Hookworms:
  • Tiny and often invisible to the naked eye
  • Hook-shaped; live in the intestines
  • Usually diagnosed through fecal exams, not visual inspection
• Whipworms:
  • Very thin and thread-like
  • Rarely seen in stool
  • Live in the large intestine and cause inflammation

Pro Tip: If you spot something unusual in your dog’s stool or vomit—take a picture or bring a sample to your vet for proper diagnosis.

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Types of Worms in Dogs

Not all worms are the same, and the type of worm your dog contracts determines the symptoms, treatment, and level of risk. Understanding the differences can help you recognize problems earlier and get your pup the right care.

Here are the most common intestinal worms found in dogs:

1. Roundworms

• The most common worm in dogs, especially puppies
• Transmitted through soil, infected animals, or even a mother dog’s milk
• Can grow several inches long
• Causes a pot-bellied appearance, coughing, and digestive upset

2. Tapeworms

• Spread through fleas, making flea prevention essential
• Look like rice grains in stool or near the anus
• Dogs may scoot or excessively lick their rear due to irritation

3. Hookworms

• Very small; rarely seen without a microscope
• Can penetrate skin or be ingested
• Cause anemia, dark stool, and weakness
• High-risk for puppies due to blood loss

4. Whipworms

• Harder to detect because they shed few eggs
• Live in the large intestine
• Cause chronic, intermittent diarrhea and weight loss

5. Heartworms (A Different, Dangerous Category)

• Spread by mosquitoes—not the digestive tract
• Live in the dog’s heart and lungs
• Not visible externally
• Prevented by monthly heartworm medication
• Untreated heartworms can be fatal

Fun fact: According to the American Heartworm Society, heartworm disease has been diagnosed in all 50 states, even in indoor or low‑mosquito regions.

How Dogs Get Worms

Even the cleanest, most supervised dogs can pick up worms. Parasites are hardy, widespread, and often impossible to spot in the environment.

Here are the most common ways dogs become infected:

1. Ingesting Contaminated Soil or Feces

Dog parks, sidewalks, backyards, and hiking trails can harbor roundworm and hookworm eggs. These eggs survive for months, even years.

2. Contact With Other Infected Dogs or Animals

Sniffing or licking another dog’s rear end can lead to ingestion of microscopic eggs.

3. Eating Infected Prey

Rodents, birds, and wildlife often carry parasites.

4. Fleas (Tapeworm Transmission)

If your dog swallows a flea during grooming—even accidentally—they can develop tapeworms.

5. Passed From Mother to Puppy

Puppies can get roundworms or hookworms from:

• The placenta before birth
• Nursing after birth

6. Drinking Contaminated Water

Puddles, ponds, or standing outdoor water can contain parasites.

This is why year-round parasite prevention, hygiene, and routine veterinary care are essential.

What to Do If Your Dog Has Worms

If you suspect worms, or see any signs, don’t panic. Worm infections are usually treatable, especially when addressed early.

Here’s exactly what to do:

1. Call Your Veterinarian

A vet will perform a fecal test to identify the worm type. Different worms require different medication, so accurate diagnosis matters.

2. Follow the Deworming Protocol

Your vet may prescribe:

• Oral dewormers
• Topical medications
• Monthly preventatives (for recurring protection)

These treatments target the worm itself, but not always the eggs, which is why follow-up treatments are often necessary.

3. Schedule a Follow-Up Fecal Exam

Your vet will recheck to ensure:

• The worms are fully gone
• No new eggs are present
• Digestive inflammation is improving

4. Clean Your Dog’s Environment

To prevent reinfection:

• Clean bedding
• Remove feces promptly
• Vacuum carpets
• Wash floors
• Keep your yard picked up

5. Treat All Pets in the Household

Worms spread easily between animals, even if they’re asymptomatic.

6. Monitor Your Dog’s Appetite, Stool, and Energy

Even after treatment, digestive issues may take time to normalize.

Important: Never use over‑the‑counter dewormers without knowing which worm your dog has. Some are ineffective, and others can be harmful.

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Can Humans Get Worms from Dogs?

Yes, some types of dog worms can be passed to humans, especially children, seniors, or anyone with a weakened immune system. These are known as zoonotic parasites, and while transmission isn’t super common, it does happen, mostly through poor hygiene or contact with contaminated feces or soil.

Worms That Can Be Transmitted to Humans:

• Roundworms: Ingesting microscopic eggs from contaminated soil or dog feces can lead to visceral or ocular larva migrans, affecting organs or eyes.
• Hookworms: Can penetrate human skin, often through bare feet, causing an itchy rash called cutaneous larva migrans.
• Tapeworms: Less common, but humans (especially children) can ingest infected fleas and develop mild symptoms.

How to Protect Yourself and Your Family:

• Wash hands after handling dogs or cleaning up waste
• Always pick up your dog’s poop promptly, even in your own yard
• Deworm your dog regularly as directed by your vet
• Keep kids from playing in areas where pets relieve themselves
• Maintain flea prevention, fleas aren’t just annoying, they can carry parasites

While it’s rare for dog worms to seriously affect humans, prevention is always better than treatment—especially with children in the home.

Preventing Worms in Dogs

Preventing worms is much easier and safer than dealing with a full-blown infestation. Prevention should be part of your regular dog care routine, not just something you do after symptoms appear.

Steps to Keep Worms at Bay:

• Routine Vet Visits: Fecal exams 1–2 times per year (or more if your dog is high-risk)
• Deworming Schedule: Puppies: typically every 2–3 weeks until 12 weeks old. Adults: as recommended by your vet (often every 3–6 months)
• Year-Round Flea & Tick Control: Prevents tapeworms and other vector-borne parasites
• Pick Up Poop Immediately: Eggs can survive in soil for months, infecting other pets (and even you)
• Avoid High-Risk Areas: Discourage your dog from drinking from puddles, eating wild animals, or sniffing feces
• Clean Living Spaces: Wash bedding regularly, vacuum carpets, and keep food bowls clean
• Feed a High-Quality, Gut-Friendly Diet: Dogs with strong digestion and immunity are better equipped to resist parasites

Just like with people, a healthy lifestyle is your dog’s best defense against illness, including worm infections.

How Spot & Tango Supports Gut Health Naturally

While parasite prevention starts with hygiene and vet care, your dog’s diet plays a huge role in supporting their digestive resilience. At Spot & Tango, we believe that nutrition is the first line of defense.

Here’s how our Fresh and UnKibble meals help protect your pup from the inside out:

No Fillers, No Junk

Our recipes are free from wheat, corn, soy, and animal by-products, which are harder to digest and can contribute to gut inflammation that makes dogs more vulnerable to parasites.

Whole Ingredients = Stronger Immunity

Fresh meats, vegetables, and fruits provide the essential vitamins, minerals, and antioxidants that keep your dog’s immune system strong enough to fight off minor parasite exposure.

Precise Portioning

Overfed dogs are more likely to suffer from digestive upset, which can increase susceptibility to worms. With Spot & Tango, meals are perfectly portioned to your dog’s ideal weight and lifestyle.

Improved Stool Quality

Better digestion = firmer, healthier stools. This not only makes clean-up easier, but also reduces the chance of lingering parasites in your yard.

Your dog’s gut is a complex ecosystem, and when it’s well-fed with the right ingredients, it becomes much harder for parasites to take hold.

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Catch Worms Early, Prevent Them Always

No pet parent wants to think about worms, but they’re a part of life for many dogs, especially those who explore the outdoors or live in multi-pet homes. The key isn’t panic, it’s proactive care.

With regular vet checkups, routine deworming, and a diet that supports healthy digestion, you can dramatically reduce your dog’s risk of infection, and catch any issues early if they arise.

And if you’ve ever wondered whether your dog’s diet affects their gut health and parasite risk…the answer is a resounding yes.

Give Your Dog the Clean Nutrition They Deserve

Spot & Tango’s Fresh and UnKibble meals are made with real, whole ingredients that help strengthen your dog’s gut, support immunity, and make digestion easier—so they’re better equipped to fight off common parasites like worms.

No fillers. No by-products. No guessing. Just fresh food, perfectly portioned, and delivered to your door.

Take our 60-second quiz to get a personalized meal plan that supports your dog’s health, inside and out.

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FAQs About Worms in Dogs

Q: How often should I deworm my dog?

It depends on your dog’s age, lifestyle, and health. Puppies are often dewormed every 2–3 weeks until 12 weeks old, then monthly until 6 months. Adult dogs usually need deworming every 3–6 months, or as recommended by your vet.

Q: Can my indoor dog get worms?

Yes. Indoor dogs can still be exposed to fleas, contaminated shoes, or even other pets. No dog is 100% safe from exposure, which is why prevention is key—even for couch potatoes.

Q: Is it an emergency if my dog has worms?

Not always, but it shouldn’t be ignored. Some worms, like hookworms, can cause serious illness in puppies. If you see worms or signs like vomiting, diarrhea, or weight loss, call your vet promptly.

Q: What happens if dog worms are left untreated?

Untreated worms can cause malnutrition, intestinal blockages, anemia, and even death in severe cases. They can also spread to other pets—or even humans—if not addressed.

Q: Do natural remedies work for dog worms?

Some herbs and supplements may help support gut health, but they’re not a substitute for veterinary treatment. Always consult your vet before using any non-prescription remedy.