How to apply spot on flea and worming treatment

Cats and dogs need regular flea and worming treatment to stay healthy and prevent these parasites.

There are lots of treatment options available, but a combined flea and worming spot on treatment is easy and effective. Always speak to your vet about the right treatment for your pet.

How to apply the treatment

  1. Find the place between your dog or cat's shoulder blades (this will ensure they cannot lick or get to it)
  2. Open the spot on treatment pipette and pierce the opening as outlined on the instructions
  3. Part the fur on the back of their neck so you can see the skin
  4. Squeeze the treatment onto a few different areas of skin between your dog or cat's shoulder blades parting the fur each time if necessary
  5. Give them lots of praise
  6. Wash your hands
  7. Give them a treat

Important information about applying spot on treatment

  • Avoid washing or letting your pet swim afterwards
  • Try not to stroke the area where you've used the treatment in the day or so after. If you accidently touch the area, make sure you wash your hands straight away.
  • Only ever apply a dog treatment to a dog and a cat treatment to a cat
  • The spot on treatment must always be the correct size of products for your pet

Side effects of treatment

Side effects from flea and worming treatments are rare, but can happen including:

  • breathing problems
  • salivating
  • weakness or wobbling when moving
  • vomiting

If your pet shows any signs of a reaction after applying the treatment, contact your vet immediately.

How often do you have to treat your dog or cat

How often you apply treatment will depends on your pet and the treatment you choose, but it's typically every four weeks. If you're not sure, read the packaging instructions or speak to your vet.


Always make sure you are using the correct treatment for your pet by speaking to your vet.

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• 28 September 2023

Next review

• 27 September 2026

Approved by
Anna Ewers Clark

Veterinary Surgeon MRCVS