How Long Does it Take for Worms to Leave a Dog?

Worm infestations, in particular, are challenging on your dogs, inducing diarrhoea and vomiting, among many other problems.

Not only is it difficult to see your dog in pain, but the aftermath of medication makes the worms exit its body through their poop.

How Long Does it Take for Worms to Leave a Dog?- As a worried parent of a worm-infested dog, you may question how long does it take for worms to leave a dog.

Here’s a breakdown of dog worming, how it works, and how to prevent infestations:

Understanding Worm Infestations

  • Common Problem: Worms are a frequent health concern for dogs and puppies.
  • How Dogs Get Worms:
    • Contact with contaminated soil or feces
    • Eating infected prey
    • Mother’s milk (for puppies)
  • Symptoms to Watch For:
    • Appetite and weight loss
    • Vomiting and diarrhea
    • Worms visible in stool
    • Coughing
    • Potbelly and bottom-scooting

How Deworming Works

  • Veterinary Treatment is Essential: Don’t try to treat worms without a vet’s diagnosis and medication.
  • Medication Types: Oral tablets, liquids, or injections.
  • How it Works: Dewormers either kill or paralyze the worms, leading them to be expelled through the dog’s feces.

How Long Worms Take to Leave

  • Medication Starts Working Quickly: Within 2-14 hours.
  • Worms Exit Over a Few Days: They generally leave a dog’s body within 2-3 days, but it can take up to a week in some cases. Seeing worms in the poop is normal.
  • Puppy Deworming: Requires frequent deworming starting at 3 weeks old.

Prevention is Key

  • Cleanliness: Keep your home and dog’s environment clean.
  • Supervise Outdoors: Prevent your dog from interacting with unknown feces or eating prey.
  • Regular Deworming: Follow your vet’s recommendations, even if your dog seems healthy.
  • Dispose of Poop Properly: Pick up after your dog immediately.

Ringworm Considerations

  • Quarantine: Isolate an infected dog for at least 6 weeks to prevent the spread of this fungal infection.

Key Takeaways

  • Don’t Ignore Worm Symptoms: Seek prompt veterinary care for diagnosis and treatment.
  • Deworming is Effective: Medication works quickly, and seeing worms in the poop is a sign the treatment is doing its job.
  • Prevention is Best: Good hygiene, supervision, and regular deworming protect your dog’s health.

What Causes Worms to Enter Dogs’ Bodies?

To understand the issue better, you must identify the source of the infestation. Worms can be found in dogs and puppies since they spend most of their time outdoors.

Interacting with Contaminated Soil

Dogs are curious animals that run wild when left outdoors. They naturally gravitate towards soil in open areas as multiple new factors stimulate them.

Living in soil are various worms in the form of eggs and larvae, which are ingested by your dog when it licks its paws covered with soil, or while sniffing or rolling in the soil.

Eating Infected Prey

If you tend to leave your dog unsupervised outdoors, your dog likely exercises its freedom by engaging in preying on small animals, insects, or birds.

In such cases, if the prey happens to have worms living inside of it, they end up in your pet’s digestive system.

Contact with an Infected Animal

Depending on the kind of worm, simply coming in contact with another animal that is infected can result in your dog getting infected too.

Contact with Infected Animals’ Poop

A dog infected by worms threatens other dogs as long as it or its faeces containing the parasites come in contact with another dog.

Causes of Worming in Puppies

The exact reasons apply to puppies, and they are more susceptible to getting infected with worms and require regular deworming, according to the veterinarian’s advice. The likelihood of a puppy not having worms is almost 0%.

Contaminated Milk from the Mother

Similar to how ingesting an infected prey can lead to worms in your dog’s body, consuming milk from its mother that is infected while nursing has the same effect. The transfer of worms can even happen before birth.

Symptoms of Worms Living in Dogs

A parasite living in the body causes symptoms common to several other issues. If you suspect an infestation, it is best to take your pet to the vet at the earliest.

Loss of Appetite and Weight

A drastic reduction in your dog’s appetite and weight is to be expected as the nutrients of the food it consumes are redirected to the parasite, depriving your dog and making it look tired and lazy.

Malabsorption of Nutrients

Parasites suck the nutrient value to sustain themselves, leaving the host malnourished even though it appears as if the dog is eating normally from an unsuspecting view.

Presence of Roundworms in Feces

A roundworm infestation can be identified by checking your dog’s stools. Small grain-like particles could be a sign of roundworms.

Presence of Tapeworms

Tapeworms can be quite easily identified as they stick onto dogs’ skin and are usually found towards the rear near the anus and the hind legs.


A persistent dry cough may be a sign of worms moving towards the lungs and blocking the path of blood pumped away from the heart. Consistent coughing in dogs is a definite cause for concern that must be addressed at the earliest.


Irrespective of the type of worm, your dog is bound to have bouts of vomiting. Depending on the type of worm, you may see some worms in the vomit.

Although vomiting is a common symptom of several conditions, it is a giveaway sign of a larger issue than meets the eye.


Another common symptom, soft stools, may also be accompanied by blood. In either case, rush to the vet as this may lead to dehydration and blood loss, both of which are issues that become difficult to treat as they progress.


A sudden change in the appearance of your dog’s stomach is a sign of being worm infected. This is due to enlargement of the intestines in sections where the parasite lives in proportion to the growth of the worm/s.

Irritation and Scratching

Dogs can sense the parasite even if it is inside their body, and it irritates the inner lining of the intestines, causing dogs to rub their bottom on the floor aggressively in a bid to reduce the itching. The same applies to worms that attach to the skin, resulting in excessive itching.

How Does Deworming Work?

This is not a problem that can be resolved without medical attention. If left alone, your dog continues to lose energy as the parasite multiplies inside its body and becomes a carrier that can infect other animals that come in contact with it or its faeces containing worms or their eggs.

The veterinarian can deduce the kind of worm based on studying a sample of your dog’s stool under the microscope and its symptoms.

Deworming can be done through simple medication that can be administered orally as tablets or liquid dewormers or through injections.

Some dewormers work towards killing the pest, while some paralyze worms. Ultimately, the worms exit the dog’s body through its stool, either alive or dead.

How Long Do Dog Worming Tablets Take to Work?

Tablet dewormers come in flavours to make it easier to administer the dose. The medication begins to show effect within 2 to 14 hours.

This is the time taken to kill or paralyze the worms; this does not mean that the worms will exit the dog’s body immediately.

The worms exit through the route of faeces or are digested if they are broken down into small enough particles and later cause diarrhoea, ultimately exiting through poop.

How Long Does it Take for Worms to Leave a Dog?

Worms in your dog’s body usually exit the body within 2 to 3 days. You may continue to find worms in your dog’s poop for up to a week, depending on the case’s severity and the medication’s effectiveness. Seeing worms in your dog’s faeces is not a cause for worry. It is a sign that the medication is effective.

How Long Does a Puppy Poop Worms?

Puppies require regular deworming to keep them parasite-free from the age of 3 weeks old. It is recommended to deworm your dog every two weeks until it reaches the age of 3 months.

As your puppy matures into an adult dog, the regularity of deworming can reduce as a preventative measure and can be administered when symptoms are observed. However, vets recommend a minimum of 3 deworming sessions per year to play it safe, even for adult dogs.

How Long to Quarantine Dogs with Ringworm?

Ringworm is a fungal infection common amongst various species, especially domesticated pets. It shows the effect on your pet’s skin in the form of ring-shaped rashes, which can commonly be spotted on the face, tips of the ears, tail and legs.

It is a disease that spreads easily and requires quarantining. If your dog has symptoms of ringworm infection, it is best to quarantine it for at least six weeks to keep you and the other inhabitants of your house safe.

Can Parasite Infestations be Prevented?

Although no method has yet been found to keep your pets completely free of parasites, you can adopt some practices to reduce the risk of such infections.

Keep Your House Clean

Keeping the general environment clean can help your dog stay away from pests like fleas and prevent skin infections and developing other diseases.

Supervise Your Dog in the Open

Dogs are curious animals that enjoy freedom outdoors. However, you must follow your dog everywhere to keep track of what it is up to so that any changes can be noticed immediately and the cause for the same can be found immediately.

Regular Deworming

Deworming is a process that is extremely necessary for pet dogs. Getting dewormed every three months will help treat any asymptomatic cases and keep your dog healthy.

Keep Your Pet Away from Poop

You must ensure you keep your dog in control and away from other animals’ poop to prevent it from being at risk.

Dispose off Poop Immediately

Not only is poop nasty, but it can be contaminated with worms that you cannot see. It is best to dispose of it immediately using proper methods to keep you and your pet safe.

Knowing how long does it take for worms to leave a dog is not the end of deworming your dog. You must keep track of any further symptoms and consult your vet if any issue arises.

Aapt Dubey
Aapt Dubey

Aapt Dubey, a devoted canine enthusiast and experienced dog Owner, brings boundless passion to our team. With a heart full of love for our four-legged friends, Aapt is dedicated to sharing insights on dog care, behavior, and training to make every pup's life happier and healthier at

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