Most cats and dogs in the UK need regular flea, tick and worm control, but how often, and with what, depends on the animal. A dog that eats grass, swims in ponds and walks through bracken has very different risks from an indoor cat in a flat. The sensible approach is a routine agreed with your vet practice, written down and kept to.
As a broad starting point, most flea treatments are given monthly, although some last longer. The parasite experts at ESCCAP UK advise worming adult dogs and outdoor cats at least four times a year, and up to monthly for higher-risk animals. Ticks peak in spring and autumn, but they can be picked up in any month.
This is general information, not a replacement for advice from a vet who knows your pet.
How UK medicine categories work
Every licensed flea, tick and worm product carries a legal category on the box:
- AVM-GSL: general sale, available from any retailer. Includes some spot-ons and wormers.
- NFA-VPS: supplied by a vet, pharmacist or suitably qualified person (SQP), who should ask about your pet first. Many pet flea, tick and worm products sit here.
- POM-V: prescription only, from a vet who has your pet under their care. This covers all lungworm prevention, chewable flea and tick tablets and many combined products. A written prescription can usually be filled at the practice or an online pharmacy.
Shop-bought products can work well for fleas, ticks and common intestinal worms, but they do not cover everything. The PDSA points out that no lungworm protection is currently available without a prescription.
Fleas: treat the pet and the home
The fleas you see are a small part of the problem. The PDSA and RSPCA estimate that around 95 per cent of eggs, larvae and pupae live in the home, in carpets, sofas and bedding. Some stages can lie dormant for up to a year, which is why fleas can appear after the heating goes on or after a move.
How to check for fleas
- Comb the coat with a fine flea comb, especially the lower back.
- Tip what you collect onto damp white paper or cotton wool.
- If dark specks spread into reddish-brown smudges, that is flea dirt (digested blood), and your pet has fleas.
Getting rid of them
- Treat every cat and dog in the household, not just the one scratching.
- Vacuum floors, furniture and skirting boards, and empty the vacuum each time.
- Wash pet bedding on a hot wash. A machine-washable bed from the cat beds or dog beds range makes this much easier.
- For an established problem, use a household flea spray exactly as the label says, keeping people and pets out until it is dry and checking for warnings about fish and birds. Never spray it onto an animal.
- Keep going. Fleas keep hatching from pupae for weeks, so one treatment rarely ends an infestation.
Fleas also carry tapeworm. If your pet has had fleas, use a wormer that covers tapeworm as well.
Ticks: checking and safe removal
Ticks wait in long grass, woodland and moorland and climb on as animals brush past. ESCCAP UK notes peaks of roughly March to June and August to November, though the season is lengthening. After walks, run your hands over your pet’s ears, neck, legs and between the toes. A tick often feels like a small, firm lump before you see it.
To remove one, use a purpose-made tick hook or twister, available in the cat care and dog grooming sections:
- Choose the hook size that fits the tick and slide it underneath, as close to the skin as you can.
- Twist in one direction without pulling upwards until the tick lets go.
- Lift the tool away, put the tick in a sealed bag and dispose of it.
- Clean the bite with warm salty water and wash your hands.
Never squeeze, crush or pull a tick, as this can leave mouthparts behind or raise the risk of infection. Some UK ticks carry Lyme disease, and babesiosis has been found in parts of England. Ask your vet whether a tick product suits your pet’s lifestyle.
Worms: how often and why
Roundworms and tapeworms are the common intestinal worms in UK cats and dogs. Many infected animals show no signs, which is why routine worming matters. ESCCAP guidance looks roughly like this:
| Pet | Suggested frequency |
|---|---|
| Puppies | Every 2 weeks from 2 weeks old until 2 weeks after weaning, then monthly to 6 months if risk continues |
| Kittens | Every 2 weeks from 3 weeks old until weaning, then monthly to 6 months if risk continues |
| Adult dogs | At least 4 times a year, up to monthly for higher-risk dogs |
| Outdoor or hunting cats | 4 to 12 times a year |
| Strictly indoor cats | 1 to 2 times a year, or as your vet advises |
Pets that hunt or eat raw meat sit at the more frequent end. Roundworm eggs can infect people, so pick up after your dog and wash hands after handling pets.
Lungworm in dogs
Dogs catch lungworm by eating slugs or snails, often by accident while eating grass or drinking outdoors. Signs can be vague: coughing, breathing problems, unexplained bleeding or bruising, or collapse. Prevention is prescription-only, so ask your vet to build it into the routine if your dog is at risk.
Travelling into Great Britain
Dogs entering Great Britain must be treated for tapeworm by a vet 24 to 120 hours before arrival, unless they come directly from Ireland, Northern Ireland, Finland, Malta or Norway. Check the current GOV.UK rules before you travel.
Common mistakes to avoid
- Using a dog product on a cat. Many dog flea treatments contain permethrin, which can be fatal to cats. Always use a product labelled for the species.
- Guessing the weight. Spot-ons and tablets are dosed by weight band, so weigh your pet first, especially a growing puppy.
- Treating rabbits with cat or dog products. Fipronil, found in many spot-ons, must not be used on rabbits. See the rabbit section and ask a rabbit-savvy vet.
- Bathing straight after a spot-on. Many leaflets say to avoid bathing or swimming for a couple of days after applying.
- Stopping in winter. Central heating keeps fleas breeding all year.
For a new pet, the new kitten checklist and new puppy checklist cover setting up a first plan with your vet. The right product depends on the individual animal’s age, weight, health and lifestyle.
When to see a vet
Speak to your vet if your pet has sore or bald skin, keeps scratching after treatment, or has a tick bite that becomes swollen or hot, or seems lethargic or off food afterwards. Contact a vet straight away for coughing, laboured breathing, bleeding or collapse in a dog, or if a pet has been given the wrong product. Pregnant, nursing, very young, elderly or unwell animals should only be treated on veterinary advice.
Quick checklist
- Agree a flea, tick and worm routine with your vet and note the dates.
- Treat every cat and dog in the house at the same time.
- Weigh your pet before buying a weight-banded product.
- Never use a dog flea product on a cat.
- Vacuum often and hot-wash bedding during a flea problem.
- Keep a tick hook at home and check after countryside walks.
- Ask about lungworm cover if your dog meets slugs and snails.
Common questions
Do indoor cats need flea and worm treatment?
They can still get fleas brought in on clothes or other pets, and ESCCAP suggests worming indoor cats once or twice a year. The risk is lower than for outdoor cats, so the routine can be lighter. Your vet can help you decide.
Are shop-bought flea treatments as good as vet ones?
Some general sale and SQP products work well against fleas, ticks or common worms when used correctly and on time. Prescription products often cover more parasites in one dose, including lungworm. The best choice depends on your pet’s risks.
I found something like rice grains near my pet’s bottom. What now?
Small, flat segments like grains of rice are usually tapeworm, often linked to fleas. Use a wormer that covers tapeworm, deal with any fleas, and ring your vet if your pet seems unwell or it keeps coming back.
