How Long Will My Puppy Poop Worms After Deworming?

Deworming is an important part of raising a puppy, and it’s natural to wonder how long the effects will last. 

Deworming is relatively simple and can be done in just a few steps.

After you have dewormed your dog, you are probably wondering how long will my puppy poop worms after deworming? Puppies typically poop worms for 2 to 3 days after being dewormed.

You may find worms in the excrement of your dog’s puppy up to one week after deworming. This is normal and shouldn’t alarm you.

Worms can be a problem for dogs of all ages. It is important that pet owners understand how to handle these parasites and not worry or get anxious when their pet has a case of worms.

How often should you deworm your puppy? How to know when your puppy needs deworming? What should you expect after deworming a dog?

Keep reading to learn everything you need to know about deworming your puppy and we answer all your FAQs.

How Do Puppies Get Worms?

Puppies can get worms from many sources, including:

Their mother

Puppies are more likely to have worms when they are in a household with an adult dog that has a worm infestation. Since most puppies come into contact with their mother during the first 2 weeks of life, it is important to have your puppy checked for worms at the vet.

Contact with infected feces

Dogs can contract worms by ingesting infected soil, water, or food. Dogs that spend time outdoors are particularly susceptible to worm infestations.


Dogs can also get worms from mosquito bites. Certain types of worms, including heartworm, can be transmitted to dogs through mosquito bites.


Fleas can also spread worm eggs. It’s important to keep your dog on a monthly flea and tick preventative, especially if your dog spends time outdoors or in a kennel.

What Types Of Worms Do Puppies Have?

Puppies can live with worms without any trouble, but it is important to deworm your dog if he or she has parasites. Worms can come in many different forms. 

white puppy on the grass

Some of the most common types of worms in dogs are roundworms, hookworms, tapeworms, whipworms, and coccidia.


If your dog ingests live roundworm eggs, the larvae will hatch and migrate through his or her body. If these larvae make it to your dog’s lungs, they can cause a serious infection called roundworm pneumonia.


Hookworms are tiny parasites that can penetrate the skin and cause tissue damage. If a dog ingests hookworm eggs, the larvae will travel through his or her body and attach themselves to the small intestine, where they will feed on blood.


Tapeworms are long, thin parasites. Dogs can become infected with tapeworms by ingesting an infected flea or by eating raw meat that is contaminated with tapeworm eggs.


Whipworms are the smallest of the common dog worms. They live in the colon and can cause severe diarrhea, weight loss, and blood loss.


Coccidia is a type of protozoan that can cause severe diarrhea in puppies. Coccidia is most commonly found in puppies who are less than 6 months old and in dogs who live in kennels.

How Often Should You Deworm Your Puppy?

Most puppies are dewormed before being sold. To find out the exact date, you should contact the shelter or breeder. From the time puppies turn four months old, they should be dewormed once every four weeks.

As we mentioned, infestations are common in puppies. One infestation does not mean they will never return. You can keep it under control by deworming every month.

As a preventative measure, deworming should be done at least once a year after four months.

How To Know When Your Puppy Needs Deworming?

You should deworm your dog if they show any of the following signs:

Weight loss

Parasitic infections could be triggered by weight loss or stunted growth. It is important to check your puppy for parasitic infections if they suddenly stop growing or start to lose weight. 

Parasites can cause weight loss by interfering with your dog’s ability to absorb nutrients.


Many puppies vomit shortly after eating because they have worms. If your puppy is vomiting, it is important to take them to the vet for a check-up.


Diarrhea is one of the most common symptoms of worm infestations in puppies. It is important to get your puppy to the vet if they have diarrhea or loose stools.

Loss of appetite

Worms can cause loss of appetite in your pup. Your dog may start avoiding food altogether or only eat a few pieces of food at a time. This is another important sign of parasitic infections.

Lethargy, weakness, or fatigue

These are also common symptoms of a worm infestation. If your dog is acting strange or seems to be tired all the time, it’s important to take them to the vet for a check-up.

brown-puppy indoors

Pale mucous membranes (mouth, gums)

Parasites can cause mucus membranes to appear pale or white. Check your dog’s mouth, gums, and eyelids for signs of infection.

Coughing or labored breathing

Worms can cause serious respiratory problems in puppies. Although rare, these symptoms should not be ignored and should prompt a trip to the vet.

Inflamed or hard belly  

Your dog’s belly should feel soft and smooth, but this may change when parasites infect the digestive tract. If your dog’s belly feels hard, inflamed, or swollen, it may have a parasitic infection.

Abdominal worms in feces

One of the easiest ways to tell if your dog has worms is by checking their feces for signs of parasites. If you see white or light-colored worms in your dog’s stool, they most likely have a parasitic infection.

5 Easy Steps To Deworm Your Puppy

There are a few different ways to deworm your puppy, but the most common is through the use of oral deworming medication.

Here are 5 easy steps to deworm your puppy:

1. Talk to your vet

Before you do anything, it is important to talk to your vet about your puppy’s needed deworming medication.

2. Get your puppy used to take oral medication

If your puppy is not used to taking an oral medication, start by getting them comfortable with the idea. This can be done by rubbing the deworming medication on their gums or inside their cheek.

3. Give your puppy the oral medication

Once your puppy is used to the idea of taking medication, it is time to give them the oral deworming medication. Be sure to read the instructions on the medication bottle carefully.

4. Repeat as directed

Most oral deworming medications require that you give your puppy two doses, one week apart. Be sure to follow the directions on the bottle closely.

5. Repeat every month

Once your puppy has taken their first oral medication, they will need to be dewormed once a month until the parasites are gone for good. If you miss even one dose, the worms could grow back and infect your dog again. Be sure to continue giving your puppy oral medication every month.

How Soon Will My Puppy Poop Worms After Deworming?

The type of parasite and severity of the infection will determine how many worms you find in your dog’s stool.

Some parasites may not leave the stool but others will. If your dog sheds dead or live worms, it should stop within 3-4 days.

Deworming drugs usually start working within 12 hours. They can also be used to treat basic parasitic conditions within five days.

feeding puppy chewable medication

We recommend contacting your veterinarian if your dog continues pooping worms days after the treatment is completed.

To eliminate intestinal worms, some pets need two treatments. If you still see parasites in your pet’s stool after the first treatment, schedule a second one for two weeks later.

In some instances, however, you will not find worms in the stool of a dog, such as protozoan infestation like coccidia.

Because these creatures can be difficult to kill, treatment for coccidia may take up to 14 working days.

A follow-up fecal test is required in these cases to ensure that all eggs have been effectively eliminated.

What Are The Side Effects Of Deworming A Puppy?

Although some are more common than others, there are some potential side effects of deworming a puppy.

These include:

  • Diarrhea

This can be a possible side-effect of some deworming medications. This can occur due to the inflammation caused by worms that have not been removed from the intestines.

If your puppy experiences diarrhea, be sure to give them plenty of fluids and contact your vet if it doesn’t stop within a few days.

  • Vomiting

Some puppies may vomit after taking their medication. This side effect is usually not serious. However, if your puppy vomits more than once or it seems severe to you, contact your vet as soon as possible.

  • Loss of appetite

Puppies may lose their appetites after being treated for worms. This should last only a few days and is fairly normal for this kind of situation.

If your puppy continues to show no interest in food after 3 days, introduce very small portions every few hours. If they continue to refuse to eat, contact your vet.

  • Drowsiness or lethargic

Some deworming medications may cause your puppy to become extra sleepy or lethargic. It is normal for your pet to sleep more than usual after being given the medication.

However, if they seem disoriented or lethargic even after sleeping for a long time, contact your vet. It is also a good idea to give your dog plenty of fluids like water and ice cubes to keep them hydrated.

  • Mood Swing

Deworming is not a pleasant experience for your dog. They will feel some discomfort and stress. They may display uncharacteristic behavior throughout the process.

This happens often during the first week of treatment. The worms will disappear and your dog will go back to his normal routine. There is no need to worry unduly. Your pup will be fine if you provide him with a safe and pleasant place to rest during that time.

These are the most common side effects of deworming a puppy.

It is important to monitor your puppy closely for any signs of side effects after being treated for worms. If you notice anything abnormal, contact your veterinarian as soon as possible.

While most puppies will experience few if any side effects from deworming medications, it is important to be aware of what to watch for just in case. 

By being proactive and keeping a close eye on your puppy, you can ensure that they recover quickly and without any problems.

7 Tips To Keep Your Puppy Healthy After Deworming

If your vet prescribes a deworming medication for you, it is important to keep your puppy healthy after the treatment.

brown puppy smiling

Here are some tips on how you can do that:

1) Follow the doctor’s instructions carefully

This includes taking the medication at the right time and giving them enough fluids. Also, let your veterinarian know if there are any side effects that you are seeing.

2) Monitor your puppy’s stool

The first deworming treatment may not get rid of all the worms. So, it is important to keep track of their stools for a couple of weeks after the treatment. This will help you know if another dose is necessary.

3) Keep your puppy away from infected stool

If your puppy contacts an infected stool, they might become infected again. So it is important to keep them away from areas where you know other dogs may have left their feces behind.

4) Make sure your puppy has fresh water at all times

Puppies should be allowed access to clean water at all times after deworming. This is because deworming medications can cause diarrhea which can dehydrate your pup. Plenty of water also helps to flush out the worms.

5) Give them small portions of food

Deworming medication may cause your puppy to lose their appetite or vomit after eating. So it is best to feed them smaller portions of food every few hours rather than all at once. Also, a healthy diet full of fresh fruits and vegetables will help their recovery.

6) Make sure your puppy gets plenty of rest

Puppies who are being treated for worms may feel exhausted. So make sure they get plenty of rest during this time. A comfortable bed and a safe place to sleep are essential.

7) Take them for regular vet checkups

It is important to have your puppy checked for worms after they have been treated. This will help to ensure that the medication was successful and that there are no other parasites present.

People Also Ask

What Should I Expect After Deworming A Puppy?

Most puppies will not experience any side effects after being treated for worms. However, some may have a mild reaction like vomiting or diarrhea. Other side effects may include mood swings and loss of appetite.

Generally, these side effects only last for a week or so after treatment. If your puppy experiences any serious side effects, contact your veterinarian immediately.

How Long Does It Take For A Dewormer To Work In Puppies?

This depends on the age of your puppy and the kind of deworming medication you gave them. In most examples, a puppy will begin to show signs of recovery within 24-72 hours after being treated. However, it is important to continue to monitor their stool for a couple of weeks afterward.

How Long Till Tapeworms Are Gone After Deworming?

This depends on the age of your puppy, the deworming medication used, and how many tapeworms are present. In most cases, puppies will be completely free of tapeworms within 24-48 hours after being treated.

Is It Safe To Deworm A Puppy Twice?

Since puppies are very young, they are more susceptible to the effects of any medications. This is why you should always use caution when administering these treatments. If your vet tells you that it is safe for your puppy to be treated twice in the same month, then follow their instructions carefully.

Can My Puppy Eat After Deworming?

Puppies who are being treated for worms may experience a loss of appetite or vomiting after eating. So it is best to give them small portions of food every few hours rather than all at once. Giving them something they like will encourage them to eat and make them feel better.

Can I Get Worms From My Puppy?

Yes, you can get worms from your puppy. In fact, many of the most common types of worms can be transmitted from animals to humans. So it is important to take measures to protect yourself and your family such as washing your hands after being in contact with your puppy or their stool.


Puppies can easily become infected with worms so it is important to treat them quickly. Most puppies will return to their normal selves within a week after being dewormed.

However, it is best to take your puppy for regular vet checkups to ensure that they are parasite-free.

Also, make sure they get plenty of rest during their recovery. This means making sure they have enough food and water to prevent dehydration as well as a comfortable place to sleep.

If your puppy experiences any serious side effects after being dewormed, contact your vet immediately for further instructions. In most cases, these side effects will last for only a short amount of time.

Has your puppy ever had worms? How long did your pup poop worms after deworming? Share your experiences in the comment section below.

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Lovelia Horn

I’m a certified crazy dog mom, a physical therapist (for hoomans), writer, animal rescuer, and foster home provider. Together with my hubby Ryan, I’ve fostered and helped look for forever homes for over a hundred shelter dogs in the Southern Illinois area. I mostly work with Puppy Rescue 911, Inc., a certified animal rescue organization based out of Chester, IL (home of Popeye!)

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