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Identifying and treating worms in puppies

Updated 05 December 2024
Read time: 9 mins
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Written by Charlotte Niblett
Copywriter
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Reviewed by Dr. Linda Simon
Team Vet

Worms are a common problem for dogs, but are especially prominent in young puppies. That said, staying on top of your puppy's worming is crucial to avoid infestation and any other worsening conditions.

With worms and worming treatments being such a prominent part of owning a pup, it’s important that you’re clued up. And we’ve got you covered! This blog will take you through everything you need to know about worms, including spotting signs and symptoms.

 

What are worms and why are they a concern for puppies?

Certainly not the most cute or glamorous side of being a puppy parent, but worms are a common issue that many of us will face at some point during our dogs’ lives.

Affecting both puppies and older dogs, worms are parasites found in the intestines of your pup, living on blood and nutrients found in the food they digest. A mild case of worms can be quickly resolved by regular deworming, but if left can lead to more serious and complicated health conditions, and even death.

Common intestinal worms found in infected puppies

  • Tapeworms. Tapeworms are not only a common parasite in humans, but puppies and dogs too. One of the least harmful types of worm, Tapeworms live in your pup’s intestinal tract and feed off the food they eat. They’re extremely long, growing up to 6 inches, and segments of the worm can be found in your pup’s poo.

  • Whipworms. Like Tapeworms, Whipworms live in the intestine but aren’t as common, particularly in the UK. They also live off nutrients they get from your puppy’s food, and in milder cases, are often harmless and symptomless.

  • Hookworms. Hookworms are extremely dangerous for puppies and, fortunately, aren’t very common in the UK. They’re short in length, have rows of sharp teeth and make their way around the body before settling in the intestines. Hookworms are more harmful than other worms due to the amount of nutrients they take from the pup.

  • Roundworms. There are two common types of Roundworm in puppies, one that lives solely in the intestines (Toxascaris Leonina) and one that is capable of moving around the body (Toxocara Canis). However, both live on the nutrients from your dog’s food and are long and white.

 

There are also a few non-intestinal worms that can infect puppies, including:

  • Lungworm. Out of all the worms a puppy or dog can contract, Lungworm is one of the most harmful parasites, and unfortunately kills thousands of dogs a year across the UK. This parasite is a form of roundworm, contracted from consuming or coming into contact with slugs, snails and frogs.


  • Heartworm. Heartworm is another severe parasite that is transmitted to puppies and dogs via mosquitos - meaning they’re rarely, if ever, found in the UK. Heartworm initially affects the blood, but then travels to the major organs.


 How do puppies contract worms?

A puppy parent will vouch for just how curious little pups can be, doing most of their exploring with their mouths. Although a big part of their development, this inquisitiveness is why puppies are so susceptible, more so than older dogs, to contracting worms.

That said, some of the identified ways puppies can pick up worms are;


  • Accidentally consuming worm eggs or larvae. Worm eggs can’t be seen and identified without a microscope, so you won’t be able to tell whether the grass or puddle your pup is playing in is contaminated.

    This is why keeping a close eye on your pup whilst exploring the outside world is important, ensuring they’re not chomping on something they shouldn’t be. 
    That said, raw food has also been known to be a source of worms.

    Worms are commonly found in the raw meat of infected animals such as sheep and pigs. You can help reduce the chance of infection by cooking raw meat before feeding, ensuring that the meat has been frozen from the source and being extra cautious when handling it.

    Parasites and worms are more common in parts such as the intestines, so you could also consider actively avoiding these.


  • Coming into contact with infected animals. As well as dead animals, like birds or rodents, puppies can contract worms from coming into contact with other infected dogs.

    So despite how interesting a dead animal might smell to your pup, be sure to steer clear. And when it comes to meeting new dogs, unless you know their vaccination status, always approach with caution.


  • Contaminated soil. Worm eggs can also hide in soil, especially where other dogs or animals could have pooped. As gross as it may be, some puppies and dogs are not against eating poop, so it’s always best to keep an extra close eye especially when exploring new territory.

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    Signs and symptoms of worms in puppies 

    More often than enough, signs and symptoms of worms are pretty easy to spot. In some cases they are symptomless, but this makes it even more important to keep up regular worming and checks - especially in their first few months.

    Signs and symptoms of worms in puppies include;

    • Visible worms in their poop or around their bum
    • Dragging their bum across the floor (aka scooting)
    • A sudden change in their usual behaviour 
    • Losing weight
    • Loose stools and vomiting
    • Eating more than usual
    • A bloated belly

    If your pup’s displaying any of these symptoms, and you’re yet to start their preventative worming treatment - be sure to make an appointment at the vet ASAP, and keep them away from any other dogs you have in the house. If you do have any other pets and the presence of worms has been confirmed, it’s best to get them checked out too!

    Worms aside, puppies are prone to having sensitive tummies and digestive systems in their first few months, so could display these symptoms without worms being present.

    If you notice your pup is dealing with a sensitive tummy and a vet has declared them worm-free, be sure to sprinkle our Bionic Biotic powder over their next dinner! 

    Packed with prebiotics and probiotics, as well as fish oil, chicory root and vitamin E,  this nutrient-rich supplement can help alleviate symptoms caused by an upset tummy, encouraging solid stools, healthy digestion and a luscious coat. 


    Why is regular deworming important for puppies?


    Since puppies can be born with worms and pick them up quite early on, it’s important to keep on top of their worming schedule. Untreated worms in your pup can lead to an infestation, which can transform into major health conditions and in severe cases, death.

    Some worms may not affect adult dogs quite as severely, but some can be fatal for puppies and cause worrying effects such as;

    • Dehydration
    • Extreme weight loss
    • Blockages in the gut

      How often should you deworm a puppy?

      Being so prone to picking up worms and other nasties, it’s advised to worm your puppy every 2-3 weeks, up until they’re 12-16 weeks old. This should then be done monthly until they reach 6-months old - when they can then be transferred to an adult dog’s worming schedule. 

      Adult dogs should be wormed around every 3-months, for maximum protection and prevention. With so many different worming treatments out there, it’s important to note that guidelines will differ - so as an extra precaution, always speak to your vet before worming your puppy. 

       

      What happens if your puppy has worms?

      If your vet’s confirmed that your puppy’s got worms, first up, don’t panic! Your vet can begin to take you through your options, as well as introduce the best possible puppy worming schedule to prevent worms from returning in the future.

      The first thing your vet will do is prescribe a dewormer. Types of dewormers can differ depending on the type of parasite, and they’re usually administered orally. Either way, be sure to pay attention to the treatment guidance and your vet’s advice.

      Once you’ve given your pup their deworming treatment, they may experience some diarrhoea or sickness. This can be a normal reaction, and an effect of the worms being killed as they make their way through the digestive system. But, if these symptoms persist and/or get worse, be sure to take them back to the vet.

      If you have another dog, or other pets, in the house and your pup has been diagnosed with worms, ensure you’re on top of their worming schedule and book an appointment with the vet just in case.

      Signs your puppy is worm free

      Once your pup‘s had their worming treatment, you can expect it to start working within the first few hours. 

      The best way to tell if the dewormer’s working is to check their poop. If you can see live worms in your puppy’s stools, it means they’re successfully being flushed out of their system. After a few weeks, you’ll start to see dead worms instead, which is a good sign that the treatment is working.

      To be extra sure, you can always ask for a puppy stool check from your vet. Some worms can’t be seen without a microscope so to ensure that your pup is completely worm-free, speak to your vet about further stool checks.

      If you don’t see improvement in the first two weeks of your pup’s dewormer, be sure to seek further advice from your vet. 

      How to prevent your puppy contracting worms

      There are a few precautionary steps you can take to prevent reoccurring cases of worms. Remember, worms can’t always be helped, but with fast action, the right treatment and these preventative steps, you can minimise your pup’s exposure and stay in control of their health.

      Preventative steps include;

      • Changing and cleaning water bowls often, especially those outside.
      • Disinfecting your house, including washing dog bedding, rugs and sofa covers.
      • Keeping on top of your other pets’ worming treatment to avoid cross-contamination.
      • Keeping on top of scooping up poop either on puppy pads or in the garden.
      • Washing your hands before and after handling your puppy.

       

      Keeping up a good puppy worming schedule is one of the many responsibilities you sign up for when becoming a puppy parent - especially when making for a happy and healthy pup. Need to stock up on poo bags to keep the mess at bay? Why not try our Planet-Friendly Poo Bags?

      If you’re looking for more advice on how to raise your pup, be sure to check out the rest of our Puppy Hub for expert advice from vets, trainers and our in-house experts. 

      References

      1. BBC Countryfile https://www.countryfile.com/animals/pets/lungworm

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