Dog Health
Dog Worming Schedule UK — Puppies, Adults & Lungworm Prevention
Published Last updated 3 min read
Quick answer
UK dogs need regular worming tailored to age and lifestyle. Puppies require frequent treatment from two weeks old. Adults typically need worming every 1–3 months. Lungworm prevention is essential in affected UK areas. Use vet-prescribed products — many supermarket wormers are ineffective.
Worms affecting UK dogs
| Worm | Risk | Signs |
|---|---|---|
| Roundworm | High — puppies born infected; zoonotic | Pot belly, diarrhoea, visible worms |
| Tapeworm | Moderate — fleas, raw meat, scavenging | Segments in faeces, scooting |
| Lungworm | Increasing across UK | Coughing, bleeding, neurological signs |
| Hookworm | Lower in UK | Anaemia, diarrhoea |
| Whipworm | Lower in UK | Diarrhoea, weight loss |
Roundworm and tapeworm are most common. Lungworm is the most dangerous and requires specific preventive products.
Puppy worming schedule
| Age | Frequency |
|---|---|
| 2 weeks | First dose |
| 4, 6, 8 weeks | Every 2 weeks |
| 12 weeks to 6 months | Monthly |
| 6 months onwards | Adult schedule |
Puppies acquire roundworms from their mother before birth and through milk. Early worming protects puppies and reduces zoonotic risk to children.
Adult dog worming schedule
Most UK vets recommend worming every one to three months for adult dogs. Frequency depends on:
- Lifestyle — hunting, raw feeding, access to farmland increases risk
- Contact with children — more frequent worming reduces zoonotic transmission
- Lungworm risk — monthly treatment in endemic areas
- Product used — some products last longer than others
| Lifestyle | Suggested frequency |
|---|---|
| Indoor dog, low risk | Every 3 months |
| Average pet dog | Every 1–3 months |
| Hunting, raw-fed, rural | Monthly |
| Lungworm endemic area | Monthly with lungworm-active product |
Ask your vet which schedule fits your dog.
Lungworm prevention
Angiostrongylus vasorum is spread when dogs eat slugs, snails or their slime trails on grass, toys or water bowls.
Signs include coughing, bleeding disorders (nosebleeds, bruising), neurological problems and sudden collapse. It can be fatal without treatment.
Not all wormers kill lungworm. Use a vet-prescribed product that specifically covers lungworm. Monthly treatment is recommended in affected areas across England, Wales and Scotland.
Tapeworm and travel
Routine tapeworm treatment differs from the travel requirement:
- Routine — every 3 months for dogs that scavenge or have fleas
- Travel — vet-administered tapeworm treatment 24–120 hours before UK re-entry (required for dogs only)
Your vet records travel tapeworm treatment on the pet passport or health certificate.
Choosing worming products
- Purchase from your vet or pharmacy with veterinary approval
- Match product to your dog's weight — underdosing is ineffective
- Many supermarket and online products lack lungworm cover or are underdosed
- Never use cat wormers on dogs or vice versa
The BVA advises using products prescribed for your pet's species, weight and lifestyle.
Signs your dog may have worms
- Visible worms or segments in faeces
- Scooting (dragging bottom on ground)
- Diarrhoea or vomiting
- Weight loss despite good appetite
- Pot-bellied appearance in puppies
- Coughing (lungworm)
Faecal testing can identify worms — but preventive worming is still recommended because not all worms are detected in every sample.
Sources & further reading
Facts in this guide are rewritten in plain English from publicly available UK advice. We name the organisation where a specific point comes from their guidance. Links below go to the original pages — use them to read the source material directly.
PETHEALTH+ is independent. These organisations do not sponsor, approve, or partner with this website. Guidance checked against sources listed below (last updated 2026-06-25).
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Frequently Asked Questions
- How often should I worm my adult dog in the UK?
- Most adult dogs need worming every one to three months depending on the product and lifestyle. Dogs that hunt, eat raw meat or spend time with children may need more frequent treatment. Follow your vet's recommendation.
- When should puppies be wormed?
- From two weeks of age, every two weeks until twelve weeks, then monthly until six months. Puppies are born with roundworms and need regular treatment from early life.
- Do UK dogs need lungworm prevention?
- Yes in affected areas. Lungworm (Angiostrongylus vasorum) is spread by slugs and snails and is increasingly found across the UK. Monthly preventive worming is recommended — ask your vet if your area is endemic.
- What wormer do I need for travelling abroad with my dog?
- Tapeworm treatment (Echinococcus multilocularis) must be given by a vet 24–120 hours before UK re-entry. This is separate from routine worming — your vet records it on the pet passport or health certificate.