How Often Should I Worm My Dog or Cat?
- Content Writer
- Aug 11
- 2 min read
Intestinal worms and lungworm can cause serious health problems for pets — and in some cases, for people too. Regular worming is an essential part of keeping your pet healthy, but how often should you do it?
The answer depends on your pet’s age, habits, and environment. This guide explains how often to worm your dog or cat based on their life stage and lifestyle, plus the signs to watch for and when to seek veterinary advice.
Contents
Why Worming Matters
Dogs and cats can carry several types of intestinal worms, including:
Roundworms
Tapeworms
Hookworms
Whipworms
If left untreated, intestinal worms can cause:
Weight loss
Diarrhoea or vomiting
A bloated abdomen
Poor coat condition
Organ damage in severe cases
In puppies and kittens, life-threatening intestinal blockages
Lungworm – A Serious Additional Threat
Lungworm is particularly dangerous, especially in dogs. It can cause:
Breathing difficulties
Coughing
Unusual bleeding and bruising
Neurological problems
If untreated, lungworm is frequently fatal. Cats can also be affected, although less commonly than dogs.
Worming Puppies and Kittens
Young animals are especially vulnerable and can become infected before birth or through their mother’s milk.
Recommended schedule:
Every 2 weeks until 12 weeks old
Monthly from 12 weeks to 6 months
After 6 months, follow the adult schedule
Early and consistent worming helps prevent stunted growth, illness, and potentially fatal complications.
Worming Adult Dogs and Cats
For healthy adult pets, a general guide is:
Every 3 months (4 times a year) against intestinal worms
Every month against lungworm in dogs
Some pets need more frequent treatment — particularly if they hunt, scavenge, or live with children or vulnerable adults. Your vet can recommend a plan tailored to your pet.
Lifestyle Factors That Affect Worming Frequency
You may need to worm more often (every 1–2 months) if your pet:
Hunts rodents or birds
Eats raw meat regularly
Mixes with other animals
Travels abroad
Lives with young children or immunocompromised adults
Tip: Use regular flea control - fleas can transmit tapeworms.
Signs Your Pet Might Have Worms
Some pets show no symptoms, but warning signs include:
Scooting or dragging their bottom
Visible worms or egg segments in faeces
Weight loss despite eating well
Diarrhoea or vomiting
Pot-bellied appearance (especially in young animals)
Signs of lungworm in dogs may include:
Coughing or breathing difficulties
Back pain
Unusual bleeding or bruising
If you notice any of these, contact us promptly.
When to Contact Us
If you’re unsure how often to worm your pet, or you think they may have worms, we can help.
📞 Call us on 020 8459 4729 or book an appointment online for tailored advice.
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