How Often Should I Worm My Dog UK?

Puppies acquire roundworms from their mother before birth and through milk. UK charity and ESCCAP-style schedules look like this:

Underdosing as they grow is a common reason treatment fails. Weigh them and use a product licensed for that weight. Ask your vet which wormers are safe alongside puppy vaccines.

Most healthy adult dogs: every 1–3 months.

Monthly worming is the usual starting point if they:

• Hunt, scavenge or eat faeces
• Eat raw meat or offal
• Live with young children or immunocompromised people
• Live where lungworm is a known local problem
• Visit kennels, daycare or lots of parks with slug and snail exposure

Your vet adjusts frequency from lifestyle and local prevalence — not from a calendar app alone. Use the worming schedule checker to see which band you fall into, then book the product conversation.

Lungworm in dogs (Angiostrongylus vasorum) is spread by slugs, snails and frogs. It has spread across much of England, Wales and Scotland. Not all wormers cover it.

Many UK vets recommend monthly lungworm prevention as well as intestinal cover. Coughing, bleeding disorders, or a dog that is “just not right” after slug weather is a vet visit, not an extra supermarket tablet.

Heartworm is a different parasite and is not endemic in UK dogs the way lungworm is — see heartworm vs lungworm if you are reading imported US advice.

Scooting is often anal glands, not worms — see why is my dog scooting?. Visible rice-like segments usually mean tapeworm and fleas together. Treat both.

Supermarket wormers may:

• Use older, narrower active ingredients
• Not cover lungworm or tapeworm
• Be easy to underdose for your dog's current weight

Your vet prescribes licensed products matched to weight, age and local risk. That is the BVA position on choosing parasite treatments for the individual animal, not a one-size box from the aisle.

Year-round flea and tick prevention sits beside worming. Fleas carry tapeworm; skipping fleas undoes a tidy worming plan.

The worming schedule checker asks species, age and lifestyle (hunter, raw-fed, young children at home, lungworm risk). It returns a cadence, not a brand. Take that print-out or screenshot to your vet and ask whether the product you already use covers lungworm and tapeworm at the current weight.

Raw-fed and scavenging dogs ingest more parasite stages. Homes with toddlers have a zoonotic reason to stay on a tight roundworm plan — Toxocara eggs are the concern, not a visible worm in the garden.

If you move house, travel in the UK, or start using a new park with slugs after rain, ask whether lungworm advice has changed. Cover is about this dog, this postcode, this year, not a forum schedule from 2018. Reweigh before every dose — a growing puppy or a dog that has gained over winter is easy to underdose. Pair the worming date with flea day so the household rhythm is one calendar, not two forgotten boxes. Ask at the next booster whether lungworm cover is still right for where you walk.