Do Tapeworms Wriggle in Your Cat’s Litter Box?


Have you ever glanced down at the litter box and seen what looked like small grains of rice wriggling around in your cat’s feces? If so, you likely witnessed tapeworm segments actively moving in your cat’s stool. The sight may have startled you, prompting concerns about your cat’s health and questions about these squirming parasites.

Tapeworms are intestinal parasites that attach themselves to a cat’s small intestine using hook-like mouthparts. As adult tapeworms mature inside a cat, they break off segments filled with eggs that pass in the feces. In fact, seeing tapeworm segments crawling around is usually the first sign that a cat has a tapeworm infection.

While alarming, tapeworm infections are fairly common in cats. Understanding the tapeworm lifecycle and knowing what to look for can help cat owners better monitor their pet’s health. With proper diagnosis and treatment, tapeworm infections can be effectively managed.

How Cats Get Tapeworms

Cats become infected with tapeworms when they ingest fleas or small animals that contain tapeworm larvae or eggs. Tapeworms have a complex life cycle that involves an intermediate host, which is where the tapeworm larvae develop. For cats, the most common intermediate hosts are fleas and small rodents like mice or voles.

Adult fleas ingest tapeworm eggs while grooming or feeding on an infected cat. The eggs hatch into larvae inside the flea. When a cat swallows an infected flea while grooming, the tapeworm larvae are released from the flea into the cat’s digestive system. The larvae then mature into adult tapeworms that attach themselves to the intestinal wall and begin producing eggs.

Cats can also become infected by eating infected rodents. If a mouse or vole consumes tapeworm eggs, usually from contaminated food or water, the larvae develop inside them. When a cat hunts and eats the rodent, the tapeworm larvae are transmitted to the cat.

In addition, mother cats can pass tapeworm larvae or eggs to their nursing kittens. The larvae or eggs are transmitted through the mother’s milk to the kittens, where they develop into adult tapeworms in the kittens’ intestines.

Tapeworm Lifecycle

Adult tapeworms live in a cat’s small intestine and can grow up to 20 inches long. The tapeworm’s body is made up of segments called proglottids. As the tapeworm grows, new proglottids are formed at the head and mature proglottids break off from the end of the tapeworm’s body and pass out in the cat’s feces.

These proglottids contain tapeworm eggs. According to the VCA Animal Hospitals, “The eggs are passed in the cat’s feces” and can survive in the environment for several months (source).

If flea larvae or rodents ingest the tapeworm eggs while grazing, the eggs will hatch into larvae inside their bodies. Cats may then become infected by eating fleas or rodents harboring tapeworm larvae. As Kingsbrook Veterinary Clinic explains, “Once inside the cat, the tapeworm larva develops into an adult tapeworm” (source).

Do Tapeworms Move in Cat Feces?

A common sign of tapeworm infection is noticing tapeworm segments in a cat’s feces. These small, rice-grain-sized segments may appear to move or wiggle. This movement is caused by contractions of the dying segments as they release tapeworm eggs. Each segment contains thousands of eggs which are released through the contractions into the feces for the next stage of the tapeworm lifecycle.

While the segments may seem alive, the entire tapeworm does not detach and move freely in a cat’s feces. Only the terminal segments break off and exit the body through the feces. The actual tapeworm remains firmly attached in the cat’s small intestine, continually forming new segments at the head as the terminal segments break off at the tail.

So in summary, while parts of the tapeworm may appear to move in a cat’s feces, it is not the entire intact worm migrating through the feces. The movement comes from the dying segments releasing eggs as part of the tapeworm’s reproductive process.

Signs of Tapeworm Infection

The most common signs of a tapeworm infection in cats include seeing tapeworm segments in your cat’s feces or around their anus. According to VCA Animal Hospitals, “Usually, an infected cat’s owner will notice the presence of proglottids crawling on its feces. A cat will occasionally scoot or drag its anus across the ground or carpet to relieve this” ( Other signs include:

  • Abdominal distension
  • Licking or biting the anus
  • Vomiting
  • Diarrhea
  • Weight loss

PetMD notes that you may see dried, white or cream-colored segments of the tapeworm in your cat’s feces or stuck to their fur near their anus or tail ( These segments may move briefly after passing from your cat. Signs like vomiting, diarrhea, and weight loss indicate a larger tapeworm burden.

Health Risks

Tapeworms are usually not harmful to adult cats. The tapeworm itself lives in the cat’s intestines and absorbs nutrients from the digested food as it passes through. A light tapeworm infection may go unnoticed and does not cause significant health issues.

However, a heavy tapeworm infestation can potentially cause more problems. As the number of tapeworms increases, they may end up blocking part of the intestinal tract and preventing proper digestion. This is known as intestinal obstruction, and can lead to vomiting, appetite loss, and weight loss. Intestinal blockages require veterinary treatment.

Tapeworms pose the most risks to kittens and younger cats. In rare cases, the tapeworm larvae can migrate outside of the intestines and into other tissues. This is known as visceral larval migrans. It can cause liver and lung damage as the larvae invade these organs. Kittens with heavy tapeworm burdens should be dewormed promptly to avoid serious health complications.

Overall, occasional light tapeworm infections are tolerable for adult cats. But cats with heavy infestations or kittens are at higher risk. Seeing tapeworm segments around a cat’s anus is a sign that deworming is needed.


There are a few ways veterinarians can diagnose a tapeworm infection in cats:

Visual Identification of Segments
One of the most common ways pet owners discover their cat has tapeworms is by spotting small, rice-like worm segments around their cat’s anus or in their feces. These whitish segments are a portion of the tapeworm that has broken off. Seeing them is a clear sign a cat has an intestinal tapeworm infection.

Microscopic Exam of Feces
A veterinarian will take a fecal sample from the cat to examine under a microscope. They can identify tapeworm eggs in the stool and confirm an infection is present. This is a very reliable diagnostic method.

Antigen Testing

Vets can also use ELISA antigen testing on the feces to detect tapeworm proteins and diagnose an infection. This blood test can identify exactly which species of tapeworm the cat has.

With a combination of visual inspection and laboratory fecal testing, veterinarians can definitively diagnose a tapeworm infection in cats. Once diagnosed, the appropriate deworming medication can be prescribed.


The most common treatment for tapeworms in cats is oral deworming medication prescribed by a veterinarian. These medications contain active ingredients that are effective at killing tapeworms, usually praziquantel or epsiprantel.

Praziquantel works by paralyzing the tapeworms’ muscles and damaging their protective coating, causing them to detach from the intestinal lining so they can be passed in the stool. Epsiprantel also causes paralysis and forces the tapeworms to detach.

Cats with tapeworms often require multiple doses of dewormer medication, spaced 2-4 weeks apart, to fully eliminate the infestation. This is because tapeworm medications only kill the adult worms, not the larvae. Repeat doses are needed to kill newly hatched tapeworms as they mature. Always follow your veterinarian’s dosing instructions carefully.

Some common prescription tapeworm medications for cats include:
Elanco Tapeworm Dewormer,
Bayer Tapeworm Dewormer,


There are several ways to help prevent tapeworm infections in cats:

Flea control is critical, as fleas are a key part of the tapeworm lifecycle. Using monthly topical flea prevention products like flea collars, spot-ons, or oral tablets can stop fleas from infecting your cat with tapeworm eggs.

Keeping cats indoors and preventing them from hunting and eating rodents is also important, since rodents can carry tapeworm larvae. Controlling rodent populations around your home by sealing up entry points, clearing brush, and using humane traps can reduce your cat’s exposure.

Deworming kittens multiple times during their first year helps clear any worms they may have been born with or picked up from their mother early on. Veterinarians recommend deworming at 2, 4, 6, and 8 weeks of age, then monthly until 6 months old.


In summary, tapeworms are intestinal parasites that infect dogs and cats when they ingest fleas or small infected animals. The tapeworm lifecycle involves eggs being passed in the feces, where they are ingested by fleas or rodents, which allows the tapeworm larvae to develop into cysts. Cats and dogs then become infected by ingesting infected fleas while grooming or by eating infected rodents.

When it comes to tapeworm movement in cat feces, you will not see whole tapeworms moving around. Only the eggs are passed in the feces. Some signs of tapeworm infection in cats include rice-like proglottid segments around the anus or in the feces. Worm segments may be motile and crawl on the fur near the anus. Other signs are digestive issues and weight loss.

Proper flea control and deworming are crucial to prevent tapeworm infection in cats. If infected, cats should be treated with a tapeworm-specific dewormer prescribed by a veterinarian. With prompt treatment and prevention, tapeworms can be well-managed in cats.

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