Seresto Flea Collar For Dogs Over 8kg

Seresto Flea Collar For Dogs Over 8kg
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One Collar

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  • One Collar £37.99


Give your dog long-lasting protection against fleas and ticks with a Seresto flea and tick control collar for large dogs. Unlike other flea and tick protection, Seresto flea and tick collars are clinically proven to kill fleas and repel and kill ticks for 7-8 continuous months. It's the longest lasting protection available in a single application, so there's no need to remember monthly treatments. Seresto has repellent action meaning ticks do not have to bite to be killed. As a result of this, Seresto is clinically proven to reduce the risk of canine vector borne diseases babesiosis and ehrlichiosis.

Using an advanced polymer system, the collar's active ingredients are slowly released at low doses onto your dog’s skin and coat to help keep them protected. There is no mess, no grease and no smell, plus it features a specially designed safety release mechanism to give you peace of mind.

How to Use Seresto Flea and Tick Control Collar for Dogs

Simply place Seresto on your dog for the longest-lasting flea and tick protection available in a single application, meaning your dog can play-on without the worry of fleas and ticks.

Forget about fleas and ticks for 7-8 months. Fit and forget with Seresto


  • 7-8 months protection in a single application.
  • Clinically proven to kill fleas and repel and kill ticks.
  • Built in safety-release mechanisms for peace of mind.
  • Easy, long-lasting protection.
  • No mess, grease or smell.
  • Recommended by vets.


Cutaneous use. One collar per animal to be fastened around the neck.

Remove collar from protective bag directly before use. Unroll collar and make sure that there are no remnants from the plastic connectors inside the collar. Adjust the collar around the animal's neck without tightening it too tight (as a guide, it should be possible to insert 2 fingers between the collar and the neck). Pull excess collar through the loop and cut off any excess length extending beyond 2 cm.

The collar should be worn continuously for the 7–8-month protection period and should be removed after the treatment period. Check periodically and adjust fit, if necessary, especially when puppies are rapidly growing.


For dogs above 8kg bodyweight use Seresto Flea and Tick Control Collar for Dogs 8kg and Over

One collar for dogs >8kg of 70 cm length.


  • Seresto Flea and Tick Control Collar for Dogs 8.01kg and Over - Imidacloprid 4.5g, Flumethrin 2.03g


This product belongs within the animal medicines legal category of NFA-VPS (Non Food Animal - Veterinarian, Pharmacist, Suitably Qualified Person).

Need help or advice? Contact us:

All prices include VAT where applicable.

Medication Datasheets

Reviews (184)

Summary of Reviews for Seresto Flea Collar For Dogs Over 8kg

Overall 5
Ease Of Use
Value For Money
Absence Of Side Effects
174 out of 184 (95%) customers would recommend this product.
5 stars (144 reviews)
4 stars (28 reviews)
3 stars (3 reviews)
2 stars (3 reviews)
1 stars (6 reviews)

Only verified purchasers of this product can leave a review.

55 Flea collar
Verified Purchase

By on 11 July 2024

Excellent product

Customer recommends this product

55 Seresto flea collar
Verified Purchase

By on 1 July 2024

The best flea collar on the market

Customer recommends this product

55 Such a relief for me as well as my dog.
Verified Purchase

By on 18 June 2024

My poor dog suddenly got fleas for the first time in her life at 9 years old. I tried so many products to get rid of them but all the usual treatments had little or no effect. It was horrible for her and I found this collar while desperately searching on line. It arrived quickly and within 24 hrs of her wearing it the change was incredible. She's been wearing it for a couple of weeks now and fleas have gone! Happy, comfortable dog and relieved, relaxed owner. We will never go back to spot on or tablet treatment. This works.

Customer recommends this product

45 Seresto Flea Collar For Dogs Over 8kg
Verified Purchase

By on 17 June 2024

All three of our large dogs use Seresto Flea Collars, with no problems. Keeps them tick and flea free over the whole summer without having to worry.

Customer recommends this product

55 Great buy
Verified Purchase

By on 9 June 2024

I buy this for my dog and it saves the hassle of keep applying flea/tick treatment as it lasts for 8 months, although I do change this earlier if it is due to finish in high tick season

Customer recommends this product

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Q & A

Below are some recent questions we've received regarding Seresto Flea Collar For Dogs Over 8kg, including answers from our team.

10 April 2023 at 1:38pm

Size of collar for large dog

Lynda Earley

  • VioVet customer since 2014
  • From: Lincolnshire, United Kingdom

It says the length of the collar is 70cm can they be cut to size? as not all dogs have the same size neck.

  • VioVet Staff

Yes, the excess material from the collar should be cut away. Full instructions on how to apply the collar can be found within the tin.

8 September 2022 at 9:05am

Suitable for large dog

Gail Longhurst

  • VioVet customer since 2012
  • From: Dorset, United Kingdom

Is the large suitable for my 44 kg German Shepherd Please. Bought one last year but can't remember if it was large or if there was possibly an XL size

  • VioVet Staff

Yes, this collar is suitable for a 44kg dog. It is appropriate for any dog over 8kg.

3 July 2022 at 2:25pm

Seresto collar

valerie singleton

Is this suitable for all dog sizes. Mine is approx 24 kg

  • VioVet Staff

Yes, this collar will automatically dose exactly what your pet needs dependant on size. It is suitable for any size dog, including your 24kg.

18 May 2022 at 9:02am

Pregnant bitch around other dogs in house with Seresto Collars


Hi, I have a multi-dog household, is it safe for my pregnant bitch to be lying with her housemates, I’ve taken her own collar off.
Thank you

  • VioVet Staff

The datasheet states the following:
Laboratory studies with either flumethrin or imidacloprid in rats and rabbits have not produced any effects on fertility or reproduction and showed no teratogenic or foetotoxic effects. However, the safety of the veterinary medicinal product has not been established in target animals during pregnancy and lactation and in the absence of available data, the product is therefore not recommended in pregnant and lactating bitches or queens.

This means it should not be used in pregnancy or lactation, so you are right to remove your pregnant bitch's collar. The collar will transfer ingredients by prolonged direct contact with the skin. If your dog will spend a few hours or more consistently in contact with a collar then the ingredients may transfer over. It is hard to say for definite whether your dog's sleeping next to each other will be an issue, it may be safest to separate them at night just to be safe.
If your pregnant bitch will not be in skin contact with a collar when lying with her housemates then this should not be an issue. The ingredients cannot transfer from the skin of a dog with a collar on it, it must be from skin contact with the collar itself.

17 January 2022 at 9:20am

Heart worm/leishmania


My dog comes with us to Portugal so does Seresto protect against heart worm and Leishmania

  • VioVet Staff

This product is licensed to protect against fleas and ticks. Leishmania is a tick-borne disease and so it will provide some protection against this by killing ticks. Heartworm is transferred by mosquito bites which Seresto does not specifically protect against. It is recommended to use a Scalibor Collar instead if you are wanting to protect against these two diseases specifically.
If you wish to treat for heartworm then you will need to contact your vet for advice on heartworm products.

20 June 2021 at 3:00pm

Serestco Flea Collar over 8kg

Bethan King

Will the over 8kg be ok to us on my Rottweiler?


  • VioVet Staff

This depends on the weight of your Rottweiler, if over 8kg and 7 weeks of age then this collar is a great choice.

14 March 2021 at 10:47am

Seresto flea collar

Jennifer Pettman

How can I be sure your Seresto flea collars are genuine ones as there are a lot of fake ones being sold. Thanks

  • VioVet Staff

We stock all of our medications from licensed wholesalers, the same as your vet would receive supply from. We are one of the Veterinary Medicine Directorate Accredited Retails which means we undergo additional measures to ensure a high quality service is provided. You are right to be cautious as counterfit Seresto Collars have been in circulation but I can reassure you the ones we provide are genuine and made by Elanco themselves.
If you ever receive medication from a source you are unsure of then you can ring Elanco (the manufacturer) with the batch numbers/expiry date of the product. They can then verify whether the product was made by them or not.

3 January 2021 at 11:18am

Large Seresto tick collar , how long is the sell by date if I buy now.


We usually put a large Seresto collar on our Labrador in February how long does the treatment last, she has it on all the time.

  • VioVet Staff

Seresto collars reaming active, releasing the medication to your dog's skin for up to 7 to 8 months. It is recommended a new collar is applied after the 7 to 8 month mark.

19 August 2020 at 10:13am

Seresto + advocate

Jill Greenwood

  • VioVet customer since 2015
  • From: West Yorkshire, United Kingdom

I use advocate on my two dogs as they are not reliable tablet takers. Can I use the Seresto collar plus their 3 monthly Advocate, or is that too much in their system. If not is their another spot on for worms i can use in combination with the collar instead either on or off prescription?

  • VioVet Staff

You will be giving a double dose of imidacloprid if you use Seresto alongside Advocate. However overdoses of 5 to 8 times the recommended amount of imidacoprid were tolerated well in dogs in a clinical trial, with no adverse side effects. Seresto also delivers only what your dog needs, therefore it will stop dosing with imidacloprid if you have applied the Advocate, until the Advocate wears off (after 1 month).

Taking the above into account it is likely very safe to use Advocate alongside Seresto. It is worth noting you are not covering tapeworms with this treatment plan though. Unfortunately only tabletable wormers will do this. Please contact us at [email protected] if you would like advice on this.

15 August 2020 at 9:02am


W Brooks

Is this suitable for an 8 week old puppy?

  • VioVet Staff

Yes this product is suitable for puppies over 7 weeks old.
Seresto Collars last up to 7 to 8 months so I would advise picking a collar size (<8kg or >8kg) based on the weight your dog will grow to be within this time period. If you think your puppy will by heavier than 8kg within 7 months then I would choose the larger collar size.

The collar will need to be adjusted as your puppy grows but this can be done easily. The product itself will only dose your dog with the right amount that they need depending on their current size, so you do not need to worry that a larger collar will give too large a dose.

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