Cat Worms Explained: Symptoms & Prevention

Intestinal worms are a common issue in cats, and while the thought of them can be unpleasant, the good news is that they are usually manageable with the right treatment and regular prevention. Understanding how cats pick up worms, what signs to look out for, and when to seek veterinary advice can help you protect your cat’s health and comfort.

At Vetscriptions, we know many cat owners want clear, practical advice without too much jargon. In this guide, we explain the most common types of intestinal worms in cats, the symptoms they can cause, and how regular worming can help reduce the risk of problems. You can also explore our cat flea, tick and worming products and broader flea, tick & worming collection if you are looking for preventative healthcare options.

This article is intended for general guidance only and should not replace professional veterinary advice. If your pet is unwell or showing concerning symptoms, please contact your veterinary surgeon.

What are intestinal worms in cats?

Intestinal worms are parasites that live inside a cat’s digestive system. They feed off the nutrients your cat eats and, in some cases, can irritate the gut or affect overall health. Some cats with worms appear completely normal at first, while others may develop digestive upset, weight loss, or changes in appetite.

The two intestinal worms most commonly seen in UK cats are roundworms and tapeworms. Less commonly, cats may also be affected by hookworms. Kittens are particularly vulnerable because they can pick up worms early in life and may become unwell more quickly than healthy adult cats.

Common types of worms in cats

Roundworms

Roundworms are one of the most common intestinal parasites in cats, especially kittens. They are long, pale worms that can sometimes look a little like strands of spaghetti. Cats may pick them up from their environment, from hunting infected prey, or, in kittens, from their mother.

Roundworm eggs are passed in faeces and can survive in the environment for long periods. This means cats can become infected again if their surroundings are contaminated.

Tapeworms

Tapeworms are flat, segmented worms. Cats often catch tapeworms by swallowing fleas during grooming or by hunting small animals such as mice. You may notice small white segments around your cat’s bottom, in their bedding, or near their faeces. These segments can look a bit like grains of rice.

Because fleas are a common source of tapeworm infection, keeping on top of flea control is an important part of worm prevention. Our cat flea, tick and worming products may be helpful as part of a vet-recommended prevention plan.

Hookworms

Hookworms are less common in UK cats but can still occur. These worms attach to the lining of the intestine and feed on blood. In more serious cases, especially in young or weak animals, they can contribute to anaemia, which means a low red blood cell count.

How do cats get worms?

Cats can pick up worms in several different ways, and even well-cared-for pets can be affected. Common routes of infection include:

• Swallowing worm eggs from contaminated soil, litter trays, or outdoor environments
• Hunting and eating infected rodents or other prey
• Swallowing fleas that carry tapeworm larvae during grooming
• Passing worms from mother to kittens
• Sharing environments with other infected animals

Outdoor cats and cats that hunt are generally at higher risk, but indoor cats can still get worms, particularly if fleas are present or if contaminated material is brought into the home.

Symptoms of worms in cats

Some cats with worms show no obvious signs at all, which is one reason routine prevention matters. When symptoms do appear, they can vary depending on the type of worm and how heavily your cat is infected.

Common signs of worms in cats include:

• A bloated or pot-bellied appearance, especially in kittens
• Weight loss or poor growth
• Vomiting
• Diarrhoea
• Changes in appetite
• A dull coat or generally poor condition
• Visible worms or worm segments in faeces or around the back end
• Bottom scooting or irritation around the anus

These signs are not specific to worms and may also happen with other health problems. If your cat has ongoing digestive symptoms, is losing weight, or simply seems unwell, it is best to contact your veterinary surgeon for advice.

When should you contact your veterinary surgeon?

While routine worming is often straightforward, there are times when veterinary advice is especially important. You should speak to your vet if:

• Your cat is a kitten and you are unsure about the correct worming schedule
• Your cat is vomiting repeatedly or has severe diarrhoea
• Your cat is losing weight, lethargic, or not eating properly
• You keep seeing worms despite using treatment
• Your cat has fleas as well as suspected tapeworms
• Your cat has other health conditions or is taking prescription medication

Your vet may recommend a specific worming product, a faecal test, or treatment for fleas at the same time. If your cat has been prescribed medication, you can find helpful information on how to order a prescription medicine and read our prescription FAQs.

How often should cats be wormed?

The right worming schedule depends on your cat’s age, lifestyle, and risk level. Kittens usually need worming more frequently than adults because they are more vulnerable and more likely to carry roundworms.

As a general guide in the UK:

• Kittens are often wormed from a young age and then at regular intervals as advised by a vet
• Adult cats may need routine worming every one to three months depending on their lifestyle
• Cats that hunt or spend a lot of time outdoors may need more regular treatment
• Flea control should also be maintained to help reduce the risk of tapeworm

Because not every cat has the same risk, it is always sensible to ask your veterinary surgeon which schedule is most suitable for your pet.

Preventing worms in cats

Prevention is usually much easier than dealing with an established worm burden. A few simple habits can make a big difference.

Use regular worming treatment

Routine worming with a suitable product helps reduce the chance of worms building up and causing symptoms. Always use a treatment that is appropriate for your cat’s age and weight, and follow the instructions carefully.

Keep flea control up to date

Because fleas can carry tapeworm, effective flea prevention is a key part of worm control. If your cat has fleas, both issues may need to be addressed. You can browse our cat flea, tick and worming products for options commonly used in cats.

Clean litter trays regularly

Removing faeces promptly and cleaning litter trays frequently can help reduce environmental contamination. Good hygiene is especially important in multi-cat households.

Reduce hunting where possible

It is not always easy to stop a determined hunter, but reducing opportunities to catch rodents can help lower the risk of certain worms.

Wash hands after handling litter or faeces

Some worms can potentially pose a risk to people, so good hygiene matters for the whole household. Children should be supervised around litter trays and outdoor areas where cats may toilet.

Choosing the right worming product

There are different types of worming treatments available, including tablets, spot-on treatments, and prescription products. The best choice depends on your cat’s age, weight, lifestyle, and whether they need protection against specific types of worms.

Some products treat roundworms and tapeworms, while others may also help with additional parasites. It is important not to guess, especially in kittens, pregnant cats, or pets with underlying health conditions.

If you are looking for cat healthcare essentials, you can also explore our wider cat collection. For prescribed treatments, our cat prescription products section may also be useful once your veterinary surgeon has advised the right medication.

Can worms affect other pets or people?

Some intestinal worms can spread between animals, and certain worm infections can also pose a risk to people. This is one reason why regular worming, flea control, and good hygiene are so important. Homes with young children, elderly family members, or anyone with a weakened immune system should be especially careful about hand washing and litter tray hygiene.

If you have more than one pet, your vet may advise treating them on a coordinated schedule to reduce the risk of reinfection.

Final thoughts on cat worms

Worms are common in cats, but with sensible prevention and prompt treatment, they are usually very manageable. Watching for signs such as vomiting, diarrhoea, weight loss, or visible worm segments can help you act early, but regular worming and flea control remain the best way to protect your cat in the long term.

If you are unsure which treatment is right for your cat, your veterinary surgeon can advise on the most appropriate option based on their age, lifestyle, and health needs. We are also here to help you access genuine pet healthcare products conveniently and responsibly. You can browse our homepage, explore our cat worming and flea products, or visit our contact page if you need help navigating our range.

At Vetscriptions, we believe preventative care plays an important part in keeping pets happy and healthy. For more guidance on pet health products, prescriptions, and everyday care, continue exploring our website and always seek veterinary advice if you are concerned about your cat’s health.