How to Deworm Dogs and Puppies? (Vet-Approved Guide for 2025)

Worried your dog might have worms? If your pet has a bloated belly, keeps scooting its rear on the floor, or you’ve noticed tiny white segments in its stool, your dog might be dealing with intestinal worms. These parasites are more common than many pet parents realize and can affect dogs of all ages—especially young puppies.

How to deworm dogs and puppies is one of the most critical aspects of basic canine healthcare. Worms don't just affect your dog’s digestion—they can cause malnutrition, developmental delays, and even serious infections.In this guide, we’ll cover everything from types of dog worms and symptoms to treatment, prevention, and the safest deworming methods for all ages

Key Takeaways

• Puppies should be dewormed every two weeks from 2 to 12 weeks of age.
• Adult dogs need deworming every 3–6 months, depending on lifestyle and exposure.
• Deworming is easy with oral medications—available as tablets, liquids, or chews.
• Left untreated, intestinal worms can lead to serious illness in dogs—and can spread to humans.

What Are Dog Worms?

Dog worms are internal parasites—commonly found in the intestines—that survive by feeding on the dog’s nutrients. These parasites are not just unpleasant; they can severely compromise your dog’s health.

Common Types of Dog Worms:

There are four main types of intestinal worms that commonly affect dogs:

1. Roundworms

These are the most common type, especially in puppies. They resemble spaghetti and can grow several inches long. Roundworms often pass from mother to puppy during pregnancy or nursing.

2. Tapeworms

Tapeworms are flat, segmented parasites that attach to the dog’s intestinal walls. They are usually transmitted when a dog ingests fleas during grooming. You may see rice-like segments in the stool.

3. Hookworms

Hookworms are small, thin, thread-like parasites—usually less than half an inch long—and are barely visible to the naked eye.These tiny parasites latch onto the intestinal lining and feed on blood. Hookworm infestations can cause anemia, especially in puppies. They spread through contaminated soil or from mother to puppy.

4. Whipworms

Whipworms are a long, whip-like body with a thicker rear end and slender front in shape and  live in the large intestine and are harder to detect. They cause diarrhea, weight loss, and inflammation, often without obvious signs in the early stages.

Signs and Symptoms Your Dog or Puppy Has Worms

If your dog is showing any of these symptoms, a worm infestation could be the cause:

1. Visible Worms in Stool or Vomit

One of the most obvious signs is spotting worms—like white, thread-like roundworms or rice-like tapeworm segments—in your dog’s poop or vomit.

2. Scooting or Dragging Their Rear

If your dog keeps scooting its bottom across the floor, it might be due to irritation caused by worms, especially tapeworms.

3. Weight Loss Despite Normal or Increased Appetite

Intestinal parasites steal essential nutrients. If your dog is eating well but still losing weight, worms may be the cause.

4. Bloated or Potbellied Appearance

This is common in puppies with heavy worm burdens. A swollen belly, especially paired with discomfort or lethargy, is a red flag.

5. Vomiting or Diarrhea

Chronic digestive issues, including loose stools or vomiting, can indicate an internal parasite problem.

If you notice one or more of these symptoms, it’s best to consult your vet and start a deworming plan tailored to your dog’s needs.

👉 Want to ensure your dog is thriving? Learn to spot key signs of vitality in How to Tell if Your Dog is Healthy for early detection and better care

How Do Dogs and Puppies Get Worms? 

Dogs and puppies can get worms in several ways, many of which involve common behaviors or environmental exposure. Understanding these sources is key to prevention.

1. Ingesting Contaminated Soil or Feces

Dogs often sniff or lick the ground. If they ingest worm eggs or larvae from infected feces or contaminated soil, they can easily become hosts to roundworms or whipworms.

2. Flea Infestations

Fleas are more than just itchy nuisances—they can carry tapeworm larvae. When a dog swallows an infected flea during grooming, the tapeworm lifecycle continues inside the dog’s intestines.

3. Transmission from Mother to Puppy

Many puppies are born with roundworms or hookworms transmitted from their mother—either during pregnancy through the placenta or later through her milk.

4. Eating Raw Meat or Prey Animals

Consuming uncooked meat or small infected animals like rodents can expose dogs to various parasites, including tapeworms and roundworms.

👉 Wondering what really goes into your dog’s bowl? Find out why quality matters in Why Human-Grade Ingredients Matter in Dog Food and how it impacts your pet’s health.

When Should You Deworm Your Dog or Puppy?

Deworming isn’t a one-time treatment—it needs to follow a schedule based on your dog’s age, lifestyle, and risk of exposure. Starting early and maintaining a routine is essential to keep parasites under control.

For Puppies:

Puppies should begin deworming as early as 2 weeks of age. The typical schedule is at 2, 4, 6, 8, and 12 weeks, followed by monthly treatments until 6 months old. Since puppies are often born with worms or pick them up through nursing, early and frequent deworming is critical for healthy development.

For Adult Dogs:

Once your dog reaches adulthood, deworming every 3 to 6 months is recommended. Dogs that go outdoors frequently, live in areas with high stray populations, or eat raw food may need more frequent treatments.

For Rescue or Newly Adopted Dogs:

Always deworm a rescue dog or puppy immediately upon adoption. You may not know their medical history, and infestations are common in shelter environments.

High-Risk Dogs:

Dogs that hunt, dig, or eat feces are at higher risk and may require deworming every 1–2 months, under veterinary guidance.

Your vet can help set the right deworming schedule based on your dog’s age, weight, and lifestyle.

How to Deworm Dogs and Puppies: Step-by-Step Guide 

Deworming your dog doesn’t have to be complicated, but it must be done correctly to be effective. Whether you’re using a prescription, over-the-counter product, or natural remedy, following the right steps ensures your dog gets the full benefit of the treatment.

1. Choose the Right Dewormer

Start by selecting a deworming medication that targets the specific type of worm your dog may have. Veterinarians typically prescribe broad-spectrum dewormers like Drontal or Panacur. Over-the-counter options are also available, but ensure they are vet-approved and appropriate for your dog’s age and weight.

2. Follow the Correct Dosage

Dosage matters. Use your dog’s exact weight to calculate the right amount. Never guess, especially for puppies—underdosing may not kill the worms, while overdosing can cause side effects.

3. Administer the Medication Properly

Dewormers come in different forms: tablets, chewables, and liquids. Pick the one your dog takes easily. Some can be mixed with food; others must be given directly into the mouth. Always read the label instructions carefully.

4. Monitor for Side Effects

Mild symptoms like loose stools or slight lethargy are common after deworming. However, if your dog experiences vomiting, severe diarrhea, or an allergic reaction, consult your vet immediately.

5. Repeat as Recommended

Some worms require multiple doses or follow-up treatment every 2–3 weeks, especially in puppies. Stick to the schedule advised by your vet to eliminate all life stages of the parasite.

Deworming is not a one-time fix—consistency is key. Pair it with preventive measures like clean surroundings and flea control to protect your dog in the long run.

Best Deworming Medications for Dogs

Choosing the right deworming medication depends on your dog’s age, weight, and the type of worms they’re dealing with. Fortunately, a range of vet-approved prescription and over-the-counter options are available, as well as natural remedies for mild cases or prevention.

Prescription Dewormers

These are often more effective and target multiple types of worms:

• Drontal – A broad-spectrum dewormer effective against roundworms, hookworms, and tapeworms. Suitable for puppies and adults.
  
• Panacur (Fenbendazole) – Gentle yet powerful, often used for whipworms and giardia in addition to standard parasites.
  
• Interceptor Plus – Prevents heartworm and treats intestinal parasites in one monthly chewable.

Over-the-Counter (OTC) Options

OTC products are convenient but should still be used with vet guidance:

• Safe-Guard (Fenbendazole) – Similar to Panacur, available for general parasite control.
  
• Sentry HC WormX Plus – Broad-spectrum chewable for adult dogs.
  
• Nemex-2 – A liquid pyrantel-based dewormer commonly used for puppies.

Always consult a veterinarian before starting any deworming regimen,this medication for informational purposes only.

What Are Natural Ways to Deworm Dogs?

Natural deworming methods can be a gentle alternative for mild infestations or preventive care. These remedies may help improve your dog’s gut health and reduce parasite load naturally.

1. Pumpkin Seeds

Raw, unsalted pumpkin seeds contain cucurbitacin, a compound believed to paralyze worms and help expel them. Grind the seeds and mix into your dog’s food daily—about 1 teaspoon per 10 kg of body weight.

2. Coconut

Raw, grated coconut has natural antiparasitic properties. It can help expel tapeworms and improve digestive health. Start with 1 tsp daily for small dogs and up to 1 tbsp for larger dogs.

3. Papaya (especially seeds)

Papaya contains enzymes like papain, which may break down worm egg membranes. Fresh papaya or a small number of crushed seeds can be added to food in moderation.

👉 Curious about safe fruits for your pup? Discover the benefits and risks in Can Dogs Eat Papaya? before sharing this tropical treat with your furry friend.

4.Food-Grade Diatomaceous Earth (DE)

This fine powder, made from fossilized algae, can help eliminate worms by dehydrating them in the digestive tract. Only use food-grade DE (not the industrial type), and mix small amounts into your dog’s meals, following vet-approved dosages.

5. Carrots & Turmeric

Carrots act as natural fiber scrubbers. Turmeric supports the immune system and may discourage parasite growth—combine with a fat source for absorption.

Important:

These remedies are not cures for heavy infestations. Always consult a vet before use—especially for puppies or sick dogs.

How to Prevent Future Worm Infestations

Preventing worms is easier than treating them. A few consistent habits listed below that can protect your dog from re-infestation and reduce risks to your family:

1. Clean Up After Your Dog Immediately

Always dispose of your dog’s stool promptly. Worm eggs and larvae can survive in soil for weeks, so minimizing exposure helps break the parasite lifecycle.

2. Maintain Regular Flea Control

Fleas are the primary carriers of tapeworms. Use vet-recommended flea preventives consistently, whether your dog goes outside or not.

3. Avoid Feeding Raw or Undercooked Meat

Raw meat may contain worm larvae or eggs. Stick to cooked, safe diets or high-quality commercial dog food to avoid accidental transmission.

4. Follow a Deworming Schedule

Whether your dog is a homebody or a frequent explorer, routine deworming every 3–6 months is vital. Puppies and high-risk dogs need more frequent treatment based on vet advice.

5. Keep Living Areas Clean

Regularly wash your dog’s bedding, sanitize food and water bowls, and disinfect areas where your dog spends time—especially if you have multiple pets.

Consistent prevention is easier, safer, and more affordable than treating a heavy worm burden after symptoms appear.

Can Humans Get Worms from Dogs?

Yes, humans can get worms from dogs, especially through close contact or poor hygiene. Some intestinal parasites in dogs are zoonotic, meaning they can be transmitted to people—most commonly roundworms and hookworms.

Infection usually occurs when parasite eggs or larvae are accidentally ingested. This can happen when handling contaminated soil, dog feces, or surfaces without washing hands thoroughly afterward. Children are especially at risk because of their play habits and close interaction with pets.

Hookworm larvae can also penetrate human skin, causing a condition known as cutaneous larva migrans, which leads to red, itchy trails under the skin.

Hygiene Tips to Protect Your Family:

• Wash hands after playing with dogs or cleaning up after them
  
• Deworm pets regularly
  
• Avoid barefoot contact with soil where dogs defecate
  
• Keep pets out of children’s sandpits or gardens
  

Regular vet checkups and good sanitation protect both your pet and your household.

Deworming Side Effects in Dogs

Most dogs tolerate deworming medications well, but mild side effects can occur—especially after the first dose, when parasites begin to die off. These reactions are generally temporary and not a cause for concern unless symptoms persist or worsen.

Common Mild Side Effects:

• Loose stool or mild diarrhea
  
• Temporary vomiting
  
• Fatigue or slight lethargy
  
• Mild appetite changes
  

These effects typically resolve within 24–48 hours. They’re often a result of the worms being expelled from your dog’s system.

When to Call the Vet:

• Repeated vomiting or severe diarrhea
  
• Signs of allergic reaction (swelling, hives, breathing difficulty)
  
• Behavioral changes lasting more than two days
  
  

Always follow dosage instructions based on your dog’s weight and age. Never combine dewormers or give more than one type without veterinary advice.

How Long Does It Take for Deworming to Work?

Deworming medications typically begin working within a few hours of administration, with most worms expelled from your dog’s system within 24 to 72 hours. You may notice worms in the stool during this period, especially with medications targeting roundworms or tapeworms.

In some cases, especially with severe infestations, a second or follow-up dose is needed after a few weeks to eliminate remaining larvae or eggs. While physical symptoms like bloating or diarrhea may ease within days, full recovery—especially in puppies—can take a week or more.

Consistent follow-up and preventive care are key to long-term protection.

What Happens if You Don’t Deworm Your Dog?

If left untreated, intestinal worms can severely damage your dog’s health. Over time, parasites rob your dog of vital nutrients, leading to weight loss, anemia, and stunted growth—especially in puppies. A heavy worm load can cause intestinal blockages, chronic vomiting, or even death in severe cases.

Beyond the dog’s health, some worms like roundworms and hookworms are zoonotic, meaning they can infect humans—posing risks to children and immunocompromised adults.

Regular deworming is not just a treatment—it's a critical part of preventive care that protects both your pet and your family from avoidable complications.

Frequently Asked Questions

1. How often should I deworm my puppy?

Puppies should be dewormed every 2 weeks starting at 2 weeks of age, continuing until 12 weeks. After that, switch to monthly deworming until the puppy is 6 months old.

2. What’s the safest dewormer for small puppies?

Veterinarian-recommended options like Nemex-2 or Panacur (Fenbendazole) are commonly used for young puppies. These are gentle, effective, and safe when dosed correctly.

3. Can I get deworming meds without visiting a vet?

Yes, over-the-counter (OTC) dewormers like Safe-Guard or Sentry are available online or at pet stores. However, incorrect dosage or worm misidentification can reduce effectiveness. Consulting a vet ensures proper treatment.

4. Should I deworm my indoor dog?

Absolutely. Even indoor dogs are at risk of parasites through fleas, contaminated food, or eggs carried in on shoes, soil, or other pets. Regular deworming is essential for all dogs, regardless of lifestyle.

5. Can dogs get worms again after being dewormed?

Yes. Re-infestation is common if preventive steps aren't followed—like proper hygiene, flea control, or avoiding raw meat. That’s why routine deworming and preventive care remain essential throughout your dog’s life.