What is the reason your Seresto collar is no longer working?

A seresto collar is a pet collar that has been treated with chemicals like Flumethrin (4.5%) and Imidacloprid (10%) to protect your dogs and cats from the nasty bites of fleas and ticks pets skin and also helps in eliminating these little creatures effectively from your beloved pets and help pet owner to repel fleas. They also protect your pet from unpleasant bites and kills fleas. Furthermore, this Seresto tick and flea collar is intended to repel ticks and fleas for up to eight months and is non-grease, simple manner.Two active ingredients are within the Seresto tick collar to prevent ticks and fleas.

Flumethrin as well as Imidacloprid. Combining these ingredients is designed to kill larvae of fleas and ticks. They also stop the spread of fleas and manage flea infestations in your pet. Vets widely suggest Seresto collars, but numerous pet owners have reported that the Seresto collars for fleas aren’t effective on their pets. What is why the Seresto flea and tick collar are ineffective in combatting fleas?


seresto collar not working


What is it that makes it work?

The Seresto flea and tick collar comprise two active ingredients, flumethrin, and Imidacloprid. Imidacloprid is an active component that eliminates adult fleas and the larvae present in your pet’s immediate environment. The collar’s advanced technology slowly releases doses of active components for a lengthy length. Seresto has been proven clinically to kill fleas in less than 24 hours. It also actively repels and kills ticks upon contact. No bite is necessary to make it work.

If you are having issues with your Seresto collar it could be due to one of these reasons:

  • Your dog doesn’t have it: Maybe it looks obvious but it’s not, the collar works only for the duration of time your dog wears it and, ceases to function when you take it off it. You can also look into buying a brand new model.
  • Your dog is bathed too often: The Seresto collar is waterproof and remains effective if your dog becomes wet, so there is no need to remove the collar for swimming or having a bath; however, there’s a limit to how often it will get wet. After a time, it will cease to function or become less effective. It is advised not to bathe your pet more than twice a month and when they’re wearing the collar. It is highly discouraged to swim. Studies have shown that monthly shampooing or water immersion does not significantly shorten Seresto’s 7-8 months of efficacy when it comes to ticks once the active substances have been redistributed across your pet’s coat.
  • Your dog has ticks: The flea collar is a prevention method for a flea infestation, not a cure, and could not be as effective against ticks and adult fleas. If your dog’s ticks are present before you put on the collar, you’ll have to get them removed manually, or else they’ll cling to your dog for a long time after the collar has been put in place;
  • Your dog has long, thick fur: It may be difficult for the collar to function well with the coat as it isn’t able to penetrate it completely, which is why it’s not working. Seresto isn’t working is ineffective.

If you’re following the correct precautions and instructions, but the collar isn’t working, think about going back to the place you purchased it from and explaining the issue, If you’re not sure, consult your vet for a replacement.



What do you need to do in this case?

Your pet takes baths or frequently swims. Even while the collar is regular waterproof, bathing can reduce the collar’s effectiveness. The manufacturer does not recommend baths more than twice a month. We also do not take your pet for a swim during this procedure.

Your pet has a thick coat. It’s difficult for the collar’s medicine to penetrate thick coats, which is why it could not be effective.

Suppose your pet isn’t wearing it. Please be aware that the Seresto collar only works when your pet wears it. When it is removed, the operation ceases immediately. Therefore, ensure that your collar is worn at all times and even while bathing or swimming. This is also true if the collar is damaged.

The pet you have just introduced is wearing it: Tick and Flea control and elimination take time. The process starts within 24-48 hours of the moment your pet begins wearing it. The process can be slow and could take several some time. Be patient.

seresto collar not working


How can you identify fake seresto collars?

There’s a chance that the Seresto collar isn’t a genuine one if it’s not able to fight fleas and ticks. These fake collars can cause extreme burns on the skin of your pet, or they might fail to function properly, leaving your pet vulnerable to ticks and fleas.

It is crucial to differentiate these collars from genuine ones. They can often be identified easily since they are markedly different from them.

To recognize a fake seresto collar, look over the following tips:

  • Cheap collars are made of rubber and cheaply cost that to they are compared to genuine collars.
  • On original collars, the number of the LOT is written on the collar, and it matches the number on the packaging;
  •  Fake collars often contain a chemical scent; however, real collars don’t.
  • Original Seresto collars usually feature a white powder coating that you feel when you rub them, unlike imitation collars that don’t.
  • Instead of a buckle, the original versions include a release for safety;
  • Seresto collars with original Seresto packaging are more spacious (12 centimeters wide) than fake Seresto collars.
  • The printing accuracy of the fake Seresto collars is not good and could contain spelling mistakes;
  • A brochure containing information about the product and safety tips is included in the original Seresto collars that are shipped.
  • The original collars interior of the lid is colored according to the kind of items, such as Blue for big dogs, red for smaller dogs, or orange for a cat.


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Any alternatives to flea and tick collars?

A few alternatives are listed below:

  • PetAmor Plus for Dogs: PetAmor Plus for Dogs is efficient for up to 30 days.
  • Frontline Plus Flea and Tick Treatment: The Frontline could be the most well-known and popular treatment for ticks and fleas is waterproof. For other animals and dogs.

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Flea and tick collar poisoning in Dogs.

Although flea collars are among the most common methods used to eliminate tick and flea infestations, pet owners and some vets are concerned about these collars. Numerous instances were documented where dogs were hurt or poisoned by the collars. Seresto collars also called flea collar’s, are among the most frequently used tick and flea collars in the United States. They have been associated with hundreds of animal deaths, tens of thousands of injured animals, as well as numerous human injuries, etc.

After the launch of Seresto collars for ticks and fleas during 2012 and 2013, the EPA has received incidents reports of at minimum 1,698 deaths of pets. In all, there are more than a thousand deaths reported. FDA has received over 75,000 reports of incidents linked on the collars until June in 2020, including around 1,000 that involved human injury.


Pet owners have complained that the Seresto collar isn’t working. There are a variety of reasons for this; however, the most frequent explanation for the Seresto collar not working is that its chemicals (flumethrin and Imidacloprid) aren’t effective against the tick or flea. Furthermore, the chemicals could only protect your pet’s neck, face, and body, exposing their back body.


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