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Stronghold Flea Treatment for Cats and Dogs

A preventative parasite spot-on treatment for cats, dogs, puppies and kittens.

Stronghold protects your cat or dog from fleas, worms and other parasites.  This easy-to-use spot on medication is one of the most complete parasite treatments for your pet. Take a look at our range below to find this treatment in the correct dose for your pet.

Shop All Stronghold

Stronghold Prescription Flea Treatments for Cats and Dogs

Stronghold is a complete parasite protection treatment available to treat both cats and dogs for fleas, ticks, worms, and other pesky parasites. Stronghold was developed by Zoetis,  a global animal health company with over 65 years of research experience. It is a prescription-only treatment that can be purchased as individual pipettes designed to be administered to your pet monthly to prevent and treat parasite infestations.

Hill's Food Sensitives & Skin Food

Food Sensitivities & Skin

Hill's Growth and Development Food

Growth & Development 

Royal Canin Dry Cat and Dog FoodRoyal Canin Dry Cat and Dog Food

Prescription Diet

The Hill’s Prescription Diet range is a vet recommended food range to help manage specific conditions that can occur in pets, including kidney support, digestive care, weight management and more. Always consult with your vet before feeding your pet any prescription pet foods.

Royal Canin Wet Cat and Dog FoodRoyal Canin Wet Cat and Dog Food

Science Plan

The Hill’s Science Plan range offers fantastic, biology-based diets that are formulated to help your pet stay healthy and happy as they continue to grow. All Science Plan diets offer are easily-digestible and are packed full of the necessary vitamins, minerals and nutrients that your pet needs to thrive.

What our customers think of Hill's

5/ 5

My dog loves these biscuits, and they are very good for his health and weight, to keep him fit and healthy.the service is good and so is the price will use again

Trusted Customer - February 4, 2022

5/ 5

This food was a game changer for one of my Persian boys, and stopped the constant scratching and pulling out of fur. It was so successful that I could start to show him again, with great success.

Trusted Customer - January 25, 2021

5/ 5

It is a very good cat food it was recommended for my cat by my vet because of allergies and intolerances giving her an upset stomach and it has worked really well.

Kathleen Lane - August 17, 2021

5/ 5

The cat liked it - that's all that matters.

Ray Skeldon - July 5, 2021

How Does Stronghold for Cats and Dogs Work? 

Stronghold is a monthly spot-on medicine formulated to treat and prevent parasite infections on both cats and dogs. The primary active ingredient in Stronghold products is selamectin, which works by activating proteins called chloride channels on the nerve and muscle cells of parasites. This is why Stronghold flea and worm treatment options are often prescribed by vets, as the selamectin then causes paralysis to the parasite, followed by death. 


Stronghold Dosage Guide 

There are a number of Stronghold Spot On products available for dogs and cats, as well as Stronghold Plus products for cats. Each product comes in a pack of either 3 or 6 individual pipettes and should be administered to your pet once a month. 


Stronghold for Dogs Dosages

Stronghold for dogs is available in the following dosage: 

  • Stronghold Spot On Puppy & Kitten 15mg (Up To 2.5kg)
  • Stronghold Spot On Toy Dog 30mg (2.6-5kg)
  • Stronghold Spot On Small Dog 60mg (5.1-10kg)
  • Stronghold Spot On Medium Dog 120mg (10.1-20kg)
  • Stronghold Spot On Large Dog 240mg (20.1-40kg)
  • Stronghold Spot On Extra Large Dog 360mg (40.1-60kg)

If your adult dog has a bodyweight under 2.5kg or over 60kg, then consult with your vet before administering any Stronghold products. 


Stronghold and Stronghold Plus for Cats

Stronghold for cats is available in the following dosages: 

  • Stronghold Spot On Puppy & Kitten 15mg (Up To 2.5kg)
  • Stronghold Spot On 45mg For Cats (2.6-7.5kg)
  • Stronghold Spot On Extra Large Cat 60mg (7.6-10kg)

Stronghold Plus for cats is available in the following dosages: 

  • Stronghold PLUS Small Cat 15mg Spot-On Solution For Cats weighing up to 2.5 kg
  • Stronghold PLUS Medium Cat 30mg Spot-On Solution For Cats weighing 2.5-5kg
  • Stronghold PLUS Large Cat 60 Mg Spot-On Solution For Cats (5-10kg)

If your cat weighs less than 2.5kg or more than 10kg,  consult with your vet before administering any Stronghold products. 

Frequently Asked Questions

 Do Fleas Have to Bite for Stronghold to work?

No! The active ingredient in Stronghold Flea Treatments is Selamectin, with Stronghold Pro Plus also having Imidacloprid. When administered correctly these ingredients spread throughout your pet’s coat and skin to kill fleas and other parasites on contact. This means fleas do not have to bite to be killed by Stronghold flea treatment products.

Does Stronghold Also Treat Worms?

Yes. Stronghold Spot On is an all-in-one flea and worm treatment that works against fleas, roundworms, hookworms, heartworm, biting lice, sarcoptic mange and ear mites in dogs and cats.

Do I Need a Prescription for Stronghold?

Yes. Stronghold flea and worm treatment options can only be purchased with a valid prescription from your vet dated within the last 12 months.  You can buy Stronghold online through our website once this prescription has been obtained.

How Long Does Stronghold Last?

Stronghold treatments last for 5 weeks against fleas and 4 to 5 against ticks. Make sure to speak to your vet about how long your pet should be treated, however.