When and how to deworm your kitten

Worms and intestinal parasites are very common in kittens, so it’s a good idea to read up on what to look out for and treatment options ahead of time.

How do kittens get worms? Tiny though they may be, kittens can pick up worms from their mother’s milk while nursing, from the soil in your yard, or even from ingesting the eggs in feces they encounter outdoors. Luckily, several effective treatment options are available to eliminate the worms in your kitten, making it relatively easy for your vet to manage them.

The most common types of worms veterinarians find in kittens are roundworms, tapeworms and hookworms. Leaving the worms untreated can have serious health risks for young kittens with immature immune systems. Maintaining a vet-suggested deworming schedule, which may include regular fecal tests, is part of their overall health management and will help you keep your kitten worm- and parasite-free.

Here’s what you need to know to help prevent worm infestations in your kitten.

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5 min
Little orange kitten with white paws lays with his front legs stretched out and looks up

Could my kitten have worms? Symptoms to keep in mind

If your kitten has picked up worms, you may notice the following symptoms:


  • Weight loss
  • Slow growth
  • Diarrhea that may contain blood
  • Vomiting
  • Coughing or hacking with no hairball
  • A pot belly
  • Appetite loss
  • Lethargy
  • You find worm segments that resemble a flat white string or grain of rice, or segments in your kitten’s stool or in the fur around the anus
  • Worms or worm segments in your kitten’s bed

Anytime you notice those symptoms, it’s time to visit the vet for a health check.

Kitten in the litter box

How do kittens get worms? It’s easier than you think

Kittens have many opportunities to pick up worms in their everyday life, right from the start. Your kitten can get worms from eggs transmitted through their mother’s milk or from her stool in the litter box.

Contaminated areas like soil, an infected cat’s fur, or even their bed can also carry worm eggs. There could be larvae camping out on their paws from the litter box or from walking around your yard that can easily become ingested while grooming.

Your kitten can pick up worms in other ways, too.


  • Kittens and cats groom each other—fecal matter may be present on their fur and can be accidentally ingested during a mutual grooming session.
  • Worm eggs and larvae may be present in the muscle tissue and intestines of secondary hosts if your kitten hunts or picks them up outside. Eggs and larvae can infect your kitten if they ingest their prey.
  • Fleas and ticks also carry worm eggs. If your kitten swallows a flea, the eggs may enter their gastrointestinal (GI) tract, where they can mature and cause problems.
  • Many worms are zoonotic; which means they can spread between animals and humans.

The types of worms commonly found in kittens

Roundworms are long worms that enter your kitten as eggs and grow to adulthood in the intestines. Kittens can pick them up from their mother’s milk, ingesting the feces of an infected cat, or carrying or eating a secondary host like an infected bird, mouse, or insect.


  • You may notice worms or worm segments in your kitten’s stools. They look like seeds or grains of rice.
  • Symptoms of roundworms are lethargy, pot belly, vomiting, diarrhea, poor growth, appetite loss and weight loss.
  • A fecal test can identify roundworms. Treatment consists of a broad-spectrum deworming medication prescribed by your veterinarian.
  • Roundworms can be passed around between animals and humans.

Hookworms can be transmitted by the mother cat by way of the placenta or through nursing. Later, they can be transmitted through contaminated feces. Hookworms ‘hook’ to the intestinal lining and feed off your kitten’s blood, competing for the nutrients your cat needs to grow and develop. A large infestation can cause severe anemia and be life-threatening to your kitten.


  • The eggs and segments can stick to fur and paws from contaminated environments, and be ingested during grooming.
  • Fecal tests are used to identify hookworms. Treatment is a broad-spectrum deworming medication prescribed by a veterinarian.
  • Unfortunately, the treatment only kills adult hookworms. Additional tests and treatments may be necessary since the medication may leave eggs behind.
  • Humans can accidentally ingest hookworm eggs or larvae by handling an infected cat’s feces, or even by sitting on grass frequented by an infected animal. The worms can enter your system if you touch your face or don’t wash your hands.

Tapeworms are long flat worms with multiple segments, each one contains its own reproductive organs and carries eggs. Fleas. birds and rodents ingest the worm's eggs and become carriers. If your kitten eats one of the carriers, the eggs transfer to your kitten where they hatch and live inside their intestines.


  • If your kitten eats a flea (or bird or rodent) carrying tapeworm eggs, the eggs enter their GI tract, and grow into adult tapeworms.
  • Once ingested, tapeworms attach to your kitten’s intestines, living off blood and the nutrients your kitten needs to develop.
  • You may see the segments of a tapeworm in your kitten’s stool. They look like a piece of string or a long grain of rice. You may also see them on the fur near the tail area or where your kitten sleeps.
  • Tapeworms move around inside your kitten causing itchiness around the anus. You may see your kitten ‘scooting’ across the floor to relieve the itchy sensation.
  • Fecal tests can identify tapeworms. Treatment consists of a prescription-only tablet or injection administered by your veterinarian.
  • Humans can get tapeworms from eating contaminated meats or accidentally ingesting a flea or larvae from their environment.

Roundworms are long worms that enter your kitten as eggs and grow to adulthood in the intestines. Kittens can pick them up from their mother’s milk, ingesting the feces of an infected cat, or carrying or eating a secondary host like an infected bird, mouse, or insect.


  • You may notice worms or worm segments in your kitten’s stools. They look like seeds or grains of rice.
  • Symptoms of roundworms are lethargy, pot belly, vomiting, diarrhea, poor growth, appetite loss and weight loss.
  • A fecal test can identify roundworms. Treatment consists of a broad-spectrum deworming medication prescribed by your veterinarian.
  • Roundworms can be passed around between animals and humans.

Hookworms can be transmitted by the mother cat by way of the placenta or through nursing. Later, they can be transmitted through contaminated feces. Hookworms ‘hook’ to the intestinal lining and feed off your kitten’s blood, competing for the nutrients your cat needs to grow and develop. A large infestation can cause severe anemia and be life-threatening to your kitten.


  • The eggs and segments can stick to fur and paws from contaminated environments, and be ingested during grooming.
  • Fecal tests are used to identify hookworms. Treatment is a broad-spectrum deworming medication prescribed by a veterinarian.
  • Unfortunately, the treatment only kills adult hookworms. Additional tests and treatments may be necessary since the medication may leave eggs behind.
  • Humans can accidentally ingest hookworm eggs or larvae by handling an infected cat’s feces, or even by sitting on grass frequented by an infected animal. The worms can enter your system if you touch your face or don’t wash your hands.

Tapeworms are long flat worms with multiple segments, each one contains its own reproductive organs and carries eggs. Fleas. birds and rodents ingest the worm's eggs and become carriers. If your kitten eats one of the carriers, the eggs transfer to your kitten where they hatch and live inside their intestines.


  • If your kitten eats a flea (or bird or rodent) carrying tapeworm eggs, the eggs enter their GI tract, and grow into adult tapeworms.
  • Once ingested, tapeworms attach to your kitten’s intestines, living off blood and the nutrients your kitten needs to develop.
  • You may see the segments of a tapeworm in your kitten’s stool. They look like a piece of string or a long grain of rice. You may also see them on the fur near the tail area or where your kitten sleeps.
  • Tapeworms move around inside your kitten causing itchiness around the anus. You may see your kitten ‘scooting’ across the floor to relieve the itchy sensation.
  • Fecal tests can identify tapeworms. Treatment consists of a prescription-only tablet or injection administered by your veterinarian.
  • Humans can get tapeworms from eating contaminated meats or accidentally ingesting a flea or larvae from their environment.

When to deworm kittens

Kittens can begin the deworming schedule at around two to three weeks of age. This recommendation differs by country. Your veterinarian is your best resource for determining your kitten’s deworming schedule. It will also be based on your kitten’s age, size, health and lifestyle.

Most breeders and rescues start deworming before kittens leave for their new homes. If your kitten did not receive deworming medication, schedule a vet appointment to begin the deworming process.

White cat sleeping on couch

How to get rid of worms in kittens

Most cats will end up with worms at some point. Regular tests and a deworming schedule are the best prevention methods for your kitten.

That being said, many people do not understand the way deworming medication works. The medication kills any adult worms present in your kitten’s GI tract at the time of deworming. But it won’t prevent a reinfestation in the future. If a flea gets inside your house and your kitten swallows it while grooming, they will become reinfected with worms. This is why kittens need regular deworming, even if they are indoor cats.

The best preventative measures to keep worms at bay are:


  • Maintain a regular deworming schedule overseen by your vet
  • Keep your kitten’s immunizations current
  • Clean their litter box daily and check your garden as well.
  • Limit nighttime outings
  • Don’t allow your kitten to eat prey
  • Apply flea and tick treatments regularly, especially during the summer or warmer months
Close-up portrait of cat sitting on floor

The best deworming medicine for kittens. Does one exist?

There is no single best deworming medicine for kittens, unfortunately. It depends on the specific worms present. Age, weight and health also factor in. Treatment is available in several forms, such as tablets, paste or liquid, on-the-spot drops to be applied directly to your kitten’s neck, tasty treats, and injections.

Most medications are broad spectrum, meaning they can rid your kitten of several types of worms and parasites. After a fecal test determines which type of worms are present, your vet will prescribe the right medicine for your kitten. Don’t hesitate to ask for instructions on administering the treatment.

striped grey kitten playing on blanket

 

What to expect after deworming your kitten?

Deworming medication is quite safe, and side effects are rare. You may notice dead worms in your kitten's stool after the medicine is administered. This process is normal and can take a week or two, but will end once all the adult worms are eliminated.

Other side effects of the medicine are an upset stomach, diarrhea, or vomiting. When your kitten takes a deworming medicine, the medicine kills all the worms at once. This may cause intestinal inflammation and discomfort depending on the amount of worms present. This is common and should resolve on its own within a day or two. A large infestation may cause an intestinal blockage, which can be life-threatening. Always talk to your vet if you have concerns or if your kitten is really uncomfortable.

Two 5-week-old kittens in a domestic environment

Natural and over-the-counter deworming remedies for kittens

Some people use turmeric or coconut oil to rid their kittens of worms. This is not a good idea. Different worms require different treatments, so they must be identified to be treated properly. A fecal test is the only way to correctly identify them in your kitten. Home remedies may eliminate some worms, but since worms can cause severe health issues for small kittens, your vet is your best resource for keeping your kitten healthy.

Some kitten owners try over-the-counter deworming medications. These aren’t always effective. The dosage can be incorrect, or the active ingredients may be ineffective.

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