Worms are very common in dogs. Fortunately there are many deworming medicines available for treatment and easy to use. Some dogs may have adverse reactions to deworming medicine including vomiting and diarrhoea.

It is important to make sure that if a treatment is tablets, that the tablets are ingested by your dog and not spit out. There are also liquid dewormers which may be easier to administer.

The effects of worming products vary in that some are designed to kill and paralyse worms, whereas others simply dissolve them.

Regardless of the treatment your dog receives it is possible for them not to poo all their wormed worms at once – instead they may pass a few over time, or ingest numerous smaller ones in a short space of time.

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How Long Will My Puppy Poop Worms After Deworming?

How long does it take for worms to leave a dog? Puppies will usually poop worms for a couple of days as the parasites die off between 2 and 14 hours.

However, it’s not unusual for worms to still be pooped out for up to a week after deworming.

Puppies are often dewormed and have signs of worms in their poos, but sometimes worms can stay in the poos for a longer period of time before they are pooed out.

Puppy Worms

Roundworms are the most common type of worms in puppies, but they are also likely to suffer from hookworm, whipworm, and tapeworm.

Not all puppy worms derive from mom, especially if the mother dog was on a strict deworming schedule prior to pregnancy.

Hookworms attach themselves to the intestinal wall and feed off blood.

Puppies may become severely debilitated from anemia as a result of the worms’ infestation.

The odds of a puppy not having any worms are close to zero.

How Often Do You Worm a Puppy?

Puppies should be dewormed every four weeks until they are at least four months old.

After four months of age, it’s recommended that you provide deworming treatments a couple times a year as a preventative measure.

Just because you get rid of one infestation doesn’t mean that they won’t come back again, so monthly dewormings will help you keep your dog worm-free.

Puppies are very susceptible to infestations and should be given worming treatments every four months at least.

Signs of Puppy Worms

Symptoms of a wormy puppy include a pot belly — which is full of worms — vomiting, diarrhea or constipation, and failure to thrive.

Some signs of worms are your puppy looking bloated, being lethargic, dehydrated or a loss of appetite.

A large infestation of tapeworms can even kill a young pup. A puppy may look and act just fine, but then you see her deposit adult worms in her feces.

If you notice what looks like rice segments around the anus or in the stools, your puppy is probably harbouring tapeworms.

If a puppy is harbouring adult worms, it’s probably not healthy enough.

Deworming and Puppy Vaccines

Giving a puppy deworming medication will rid it of the parasites. Worming medication can also vary depending on where a puppy is in their vaccinations. However, once they are given medication, the worms may not go away immediately or completely.

Puppies are sometimes given an opportunity to socialize, but this should be restricted in the first 3 weeks of their life as they could become infected or reinfected.

If, however, after a number of poops worms are still bright white in color and moving then it could indicate that the medication has not been effective and you should check with your vet.

How long will my puppy have diarrhea after deworming?

Some puppies experience lethargy and diarrhea after receiving deworming medication. This is a normal side effect and will last between 24-48 hours after treatment.

If it persists past that, you need to bring your pup to the vet.

If you don’t see any worms or spot some live worms, diarrhea may be caused by a viral infection.

If that is the case, seek professional help from a veterinarian.

The messy issue should be over within 24 to 48 hours, but if it persists, call the vet to get your pet checked it out.

How long until roundworms are gone in dogs?

It takes approximately four weeks for roundworms to be treated with dewormer. The infective larvae and eggs can survive in your dog for a long time time and are particularly resistant to changes in conditions in the body.

Be sure to give follow-up deworming medication

If you are going to use deworming for your pooch, it is important that the first dose be given 15 days before the second. Otherwise, the treatment will not work as intended.

Oral deworming meds stay in your dog’s body for a few hours only. A follow-up dose is needed usually within two weeks, otherwise the worms may return.

Fortunately, there is a new deworming process which can be applied to the skin with sustained-release molecules. These patches remain active for four weeks with adult dogs, and avoid having to remember giving a second dose.

Know Your Dogs Weight to get the Medication Right

The deworming process is most effective when you know your dog’s weight. This enables the correct treatment and doesn’t risk over or under medicating your pet.

All Dewormers Don’t Work on All Types of Intestinal Worms

There are both different types of worms and different types of medication for both puppies and adult dogs. There are even species-specific medications.

For roundworm and flatworm your dog can take a broad-spectrum dewormer that works on both worms and eggs.

Common Types of Worms

Tapeworm is a type of intestinal parasite. Tapeworms in dogs are long and flat and can become as big as 20 centimeters in length. Your pet can get infected with tapeworm by eating something that has live tapeworms like fleas or a bird. Tapeworm deworming medicine comes in both tablet and injectable forms.

Hookworms are also intestinal worms in dogs. Hookworms are the smallest type of common dog worms varieties. Treatment for hookworms is oral medication, initially three to five days and then a few weeks for total elimination of hookworm.

Another internal parasite your pet may get is whipworms. Whipworm intestinal parasites are small and grow up to half an inch. Whipworms live in the beginning of the large intestine of dogs causing irritation. Two related symptoms of whipworms are diarrhoea and weight-loss and because of their small size they are hard to see in your dog’s stool. There is a wide variety of treatments for whipworm.

Roundworms are also internal worms particularly common in puppies and young dogs and they live in the large intestine similar to whipworms. You may be able to see roundworm in your dog’s vomit or poop.

Puppies can contract roundworms by ingesting eggs from other infected animals, or if they eat mice that already have the parasites. Roundworm can also be contracted simply by sniffing another’s dog’s poop. Even if you get rid of roundworms, your dog can still get intestinal worms after deworming.

Your Vet Can Help

Your dog’s vet can look at a sample of your dog’s stool to see if they have dead worms like roundworm. Your vet may see worms, eggs, and or larvae in the poop sample. Your vet can also give you advice about regular deworming, the correct medication to deworm your dog, and any related side effects. Your veterinarian may advise regular deworming every three months or even every month depending on your dog’s symptoms and health.

Remember, if your dog experiences weight loss or you see worms in your dog’s poop, any kind of worms, live worms, dead worms or anything that looks like rice grains, you can most likely expect that your dog is infected with a species of worms and you will need to treat your dog for worms.

It is normal for dogs to get infected with worms. You may find your dog eating a dead animal or eating another dog’s poop.

It is important to make sure that what ever treatments

How long does it take for worms to die after treatment?

Most treatments begin killing intestinal worms within a few hours of taking the de-wormer.

Can I deworm my dog myself?

Certain roundworm parasites are the most common worm seen in puppies, but they can also carry other types of parasites. This means you might need a prescription from your vet for the medications that will treat them.

How long does dewormer stay in a dog’s system?

To eliminate internal parasites, anti-parasitics stay inside your dog’s body for only a few hours. To better eliminate them, it is necessary to administer second doses every two weeks.


There are many parasites that can find their way into a puppy. They could be in the poes, or on food and toys left outside. You should always deworm your dog with the right medications to prevent any complications from developing in their intestines. Puppies will usually poop worms for a couple of days as the parasites die off between two and fourteen hours but it is not unusual for worms to still be pooped out for up to a week after treatment!