📌 KWIK SUMMARY
| Category | Key Takeaway |
|---|---|
| Roundworms | Spaghetti-like intestinal parasites |
| Symptoms | Pot-bellied appearance, vomiting (visible worms), diarrhea, weight loss, lethargy, and coughing. |
| Cure | Dewormers such as piperazine, pyrantel pamoate, fenbendazole, or prescription parasite preventives. |
| Dewormers | Durvet Wormeze Dewormer Liquid, HomeoPet Feline WRM Clear Dewormer |
Roundworms in cats are one of the most common intestinal parasites. They can grow up to 3-5 inches long and are often cream-colored, resembling spaghetti noodles. These worm-like parasites live in the digestive tract, where they steal nutrients needed for healthy growth and development. Left untreated, they may lead to serious health issues, especially in young kittens. Fortunately, most roundworm infections can be treated effectively with the right dewormer and routine preventive care to keep cats healthy and parasite-free.
Roundworm Symptoms in Cats
Spotting the signs early makes treatment faster and safer. Here's what to watch for:
- Pot-bellied or bloated abdomen - especially common in kittens; the belly looks visibly round and distended.
- Vomiting - sometimes you'll see actual worms in the vomit (they look like cooked spaghetti).
- Diarrhea or soft stools - may have mucus or a foul smell.
- Weight loss despite eating - the worms absorb nutrients before your cat can.
- Lethargy or low energy - especially in kittens (this is a serious warning sign).
- Cat roundworms in poop - you may see worm segments or whole worms in the litter box.
- Coughing - during the larval migration phase, larvae can pass through the lungs.
KWIK TIP: If you see white, thread-like worms in your cat's vomit or stool, contact your vet promptly; if your vet has already recommended an appropriate dewormer for your cat’s age and weight, begin treatment as directed.
How Cats Get Roundworms?
Cats can pick up roundworms in four main ways:
- From their mother - Kittens are frequently infected through their mother's milk (transmammary transmission). This is the #1 reason kitten roundworms are so common.
- Swallowing infective eggs - Eggs shed in another animal's feces can survive in soil for years. Outdoor cats are at high risk.
- Eating infected prey - Mice, birds, and small rodents can carry roundworm larvae in their tissue. When your cat hunts and eats them, the larvae transfer over.
- Contact with contaminated soil or surfaces - Indoor cats can also be exposed via shoes, clothing, or plants brought in from outside.
KWIK FACT: The two species that infect cats are Toxocara cati (more common, passed through milk) and Toxascaris leonina (transmitted through eggs or prey).
Diagnosing Roundworms in Cats
Cat parents might suspect roundworms based on symptoms, but a confirmed diagnosis requires a fecal flotation test at the vet. This test identifies roundworm eggs in a cat's stool under a microscope.
In some cases, diagnosis is straightforward: you can actually see the worms in vomit or feces. They're cream-colored, cylindrical, and typically 2-4 inches long.
Your vet may also recommend:
- Multiple fecal tests: Since egg shedding isn't always consistent, a single test can miss an infection.
- Testing kittens at 6-8 weeks: The standard recommendation is before or alongside their first vaccines.
- Retesting after treatment: This step is to confirm the infection has cleared.
Cure for Roundworms in Cats: Treatment Options
The most effective roundworm treatment for cats is an anthelmintic (anti-parasitic) medication - commonly called a dewormer. These work by paralyzing or disrupting the nervous system of the worms, allowing the body to expel them. To kill all the roundworm life cycle in cats, multiple doses of medication are given on a schedule.
KWIK TIP: Most dewormers for cats kill adult worms but not larvae. This is why a repeat dose 10-14 days later is almost always required to catch newly matured worms from any larvae that survived the first treatment.
Dewormers for Roundworms in Cats: Our Picks
The following dewormers can help manage roundworm infections in cats:
1. Durvet Wormeze Dewormer Liquid for Cats & Kittens (4 oz)
Durvet Wormeze is a no-fuss liquid roundworm dewormer designed specifically for cats and kittens. It targets the removal of large roundworms (ascarids)(Toxocara cati and Toxascaris
leonina).
Note: The presence of these parasites should be confirmed by laboratory fecal examination. Consult your veterinarian for assistance in the diagnosis, treatment, and control of parasitism.
Benefits:
- Inexpensive and easy to find without a prescription
- Flexible dosing - can be mixed directly into food or water, or given orally
- Palatable formula - most cats accept it without fuss
- Proven control and removal of large roundworms
Active Ingredient: Piperazine Citrate - 275 mg per teaspoon (5 mL).
Safe For: Cats and kittens 6 weeks of age and older.
Durvet Wormeze Dewormer Liquid for Cats & Kittens 4-oz
2. HomeoPet Feline WRM Clear Dewormer for Cats
HomeoPet Feline WRM Clear is a veterinarian-formulated natural remedy that supports the body's own immune response to remove worms, including tapeworms, whipworms, roundworms, and hookworms. Unlike conventional dewormers, it does not kill worms directly but instead helps your cat's system naturally expel them.
Benefits:
- Supports natural removal of multiple worm types (roundworms, tapeworms, whipworms, hookworms)
- May help detoxify and aid recovery from conventional deworming treatments
- Easy liquid drop formula - give directly in mouth, in water, or with food
- No food withdrawal period required
Ingredients: HPUS: ACTIVE: A 15 mL bottle contains 4.16% each of: Arsenicum alb 8x, Calc carb 12x, Chenopodium anth 8x, 3c, Cina 4x, Cucurbita pepo, semen 2x, 4x, Ferrum phos 12x, Filix mas 6x, 3c, Granatum 3x, 3c, Kamala 3x, 3c, Naphthalinum 5c, Nat mur 6x, Nat phos 6x, Nux vom 8x, Silicea 12x, Spigelia anth 4x, Sulphur 6x, Teucrium mar 4x, Thymolum 4x, Triticum 3x. INACTIVE: 10% USP Alc., Glycerin, Purified Water.
Safe For: All ages - kittens through senior cats
HomeoPet Feline WRM Clear Dewormer for Cats 15 ml
Prevention: How to Keep Roundworms From Coming Back?
Treating the infection is only half the battle in getting away from roundworms. Preventing re-infection is just as important, especially in households with multiple cats or outdoor access.
- Use monthly preventatives. Many broad-spectrum parasite prevention cat medications include roundworm coverage. Talk to your vet about year-round options.
- Clean the litter box daily. Regular cleaning helps reduce exposure to roundworm eggs, while choosing well-designed litter boxes makes maintenance easier and supports better hygiene.
- Wash your hands after handling cats or litter. Roundworms are zoonotic, so humans, especially children, can get infected.
- Keep cats indoors or limit hunting. Cats that hunt rodents or birds have a much higher re-infection risk
- Test kittens regularly. Vets recommend fecal tests at 6, 8, and 12 weeks, then annually for adult cats.
- Use flea preventatives regularly. Good parasite control helps protect your cat's overall health and reduces the burden of multiple pest infestations.
Conclusion
Roundworms in cats are a common problem, especially in kittens and outdoor cats, but timely treatment can prevent serious health complications. Watching for early symptoms, following a proper deworming schedule, and maintaining good hygiene are the best ways to protect your cat from recurring infections. With the right dewormer and preventive care, most cats recover quickly and return to their healthy, active selves.
For regular deworming cat supplies, cat health & wellness products, and parasite prevention essentials, browse the full cat collection at Kwik Pets. Free shipping on orders $49+.
