Deworming Puppies – When, Why & How?


A devoted pet parent, pet store manager and animal shelter volunteer. Read more about me here.

Let's learn about deworming puppies today, guys! 

Dogs, as well as humans, sometimes suffer from parasites inside their intestines.

Intestinal parasites are not a novel notion and they have been around forever. However, it can be prevented and treated by a proper schedule.

Parasites don't want to kill your dog; they just want to use him as a dinner plate!

What is important is that you can take some action to prevent any further problems that may arise because of this.

I know - the thought of worms is not very pleasing, but it’s crucial to know when you should worm your puppies for their well-being.

Not doing so may result in severe consequences!

Without hesitation, let’s see what you can do to make your puppy’s life better!

Last Updated: March 3rd 2024

Where Do Worms Come From?

dewoming puppies - where do worms come from?

It seems that worms are everywhere.

Young puppies’ immune system is underdeveloped, and that’s why you have to take actions from the very beginning of their lives.

What Are The Ways in Which Your Dog Can Contract Worms?

  • Puppies may be born with worms.

  • Worms can also be passed onto puppies from their mother before they are born or while they are suckling.

  • Raw food, especially raw meat, can be a cause.

  • Eating a flea that contains eggs of some worms, too.

  • By the way, even the bottom of your shoes can contain these parasite eggs!

  • Parasites that get your dog infected can live on the ground up to 5 years or so. 

  • Sniffing the soil with infected feces can infect your dog.

  • Licking themselves or their fellows, too, even though this is less common.


It’s not that surprising how widespread parasites are, considering all the ways they can enter your dog’s body (and you’re not entirely safe, either).

Luckily, you’re on the right track to fight them! Keep reading!

Signs That Your Puppy Could Have Worms

There are some common signs based on which you can diagnose your puppies to be suffering from parasites in the intestines:

signs that your puppy has worms

Mommy, I may have worms 😢

  • Dehydration

  • Lethargy

  • Anemia

  • Weakness

  • Swollen tummy

  • Diarrhea or vomiting (sometimes you can literally see worms)

  • Scooting their bottom around the ground

  • Weight loss, despite a good appetite

Common Types Of Worm

Different kinds of worms are to be found in different areas, varying geographically (depending on climate, temperatures, etc.).

Knowing the type that your dog potentially has is important, as different types cause different consequences.


How it can be contracted


Roundworm (the most common type)

Infected poop, dirty places

Potbellied appearance, weight loss, weakness, vomiting, diarrhea, stunted growth

Hookworm (the most dangerous type)

Mothers to their puppies before birth or through suckling; puppies can be born with it

Anemia, poor appetite; black, tar-like stool, containing blood, constipation

Eating larvae from a host animal (e.g., a flea, or a mouse)

Anemia, poor appetite; black, tar-like stool, containing blood, constipation

Swallowing or sniffing the ground that contains infected soil, or other dogs’ feces

Chronic bowel inflammation, mucus in stool, weight loss, diarrhea

Raw or uncooked meat

Fever, diarrhea, weight loss, loss of appetite

Heartworm (extremely dangerous, but less common, and not contagious)

Mosquito bite

Heart and lung damage, cough, lethargy, fatigue

Ringworm (not common, but very contagious, even for people)

Fungus on the skin, direct contact with other dogs

Of course, this knowledge will help you determine whether your dog has parasites, and what kind, but you ought to get a confirmation from the vet! 

Sometimes, these symptoms can point out to some other, totally unrelated matters.

Here’s a video that tells you more about hookworms, as they are something to be approached with caution:

Worming Treatments

deworming puppies - why, when, and how

Taking proper care of your pet is pure love! Thanks for reading this! 🙂

Worming is effective because it kills any present worms once you put it into practice. In other words, you deworm your little pup.

However, worming does not equal prevention, so I will mention that, too, a bit later.

The most common worming treatments include:

Take a look at what a vet has to say on deworming:

At What Age To Worm Your Dog?

As I mentioned, worming should be practiced with puppies, as they are most vulnerable and prone to worms.

But how should you do it?

In a systematic and responsible way, of course.

Puppies 4 to 12 weeks of age should be wormed every two weeks.

From 12 weeks to 6 months, puppies should be wormed monthly.

From 6 months onward, dogs and puppies should be wormed every 3 months.

On a broader note, for puppies, worming should be done at 2, 4, 6, & 8 weeks of age, then repeated at 12 and 16 weeks of age.

Worm again at 6 months and one year; then worm as an adult.

Based on this info, here’s a schedule plan on worming puppies for your convenience:

Every second week

From 2 weeks - 12 weeks of age

Every month

From 12 weeks - 6 months of age

Every three months

For the rest of life (this is the standard)

For adult dogs, I recommend the standard here. 

If your dog is a big hunter, they will need more frequent worming - you must assess the risk for your pet. General dog worming is done two to three times a year.

If you think that this is too often, just think about how dogs put everything in their mouth. That’s why they need worming twice a year - to eliminate the parasites they will pick up.

Prevention Is The Best Treatment

deworming puppies - prevention is the best treatment
You know how they say: An apple a day…

Even though complete prevention is impossible, the best way to worm your dog is to try to prevent it. 

Follow these simple steps to prevent parasites inside your dog’s intestines:

  • Don’t let your dog go to the toilet in areas where kids usually play.

  • Take your dog to the vet at least once a year for checking out all kinds of worms (for puppies, more than two times is preferred)

  • Prevent your dog from flea, which can be done by keeping a clean environment, using flea-killing shampoo, or flea treatment, if needed.

  • Keep your dog away from its poop by picking it up right away. Usually, clearing your indoor and outdoor areas, especially your dog’s “places”, can help.

  • Wash your hands often with soap to kill most of the bacteria, especially after playing with your dogs or being in contact with waste.

Conclusion - Deworming Puppies Isn't Hard

deworming puppies isn't hard

Wut? Already done?

Now you’re equipped with the necessary knowledge for dealing with this quite frequent and inevitable occurrence.

As you can see, it’s pretty easy, and it doesn’t take much time to (de)worm your puppies!

It is good to know when you should worm your dogs because parasites exist in your dog’s intestines all the time. 

Also, remember to follow those simple steps we talked about to prevent your dogs from getting parasites!

If you know a friend who is stuck in this vicious circle of parasites (and who isn’t), share this article with them!

About the Author

A devoted pet parent to two lovely creatures – Charlie the Cat and Jimmy the Dog – a full-time assistant pet store manager, and an animal shelter volunteer. I've gathered knowledge about pets for almost a decade, and it all started in a small store called Jack's Pets.

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