Seresto collar for large dogs
The Seresto collar for large dogs is one of the most effective and long-lasting parasite prevention methods on the market. Designed to provide continuous protection for up to 8 months, it works against fleas, ticks, and lice, helping to prevent diseases transmitted by these parasites.
Manufactured by Bayer, this collar uses a controlled-release technology that distributes active ingredients evenly over the dog's skin and coat, creating an effective protective barrier. It is odorless, water-resistant, and safe for use in dogs over 8 kg (17 lbs).
Thanks to its effectiveness, comfort, and long duration, the Seresto collar has become one of the most recommended options by veterinarians worldwide.
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How the Seresto collar for large dogs works
The Seresto collar continuously and evenly releases two active ingredients: imidacloprid, which fights fleas and lice, and flumethrin, which acts against ticks. These spread through the natural oils of the skin and coat, providing complete protection.
- Immediate action: kills fleas within the first 24 hours after application.
- Long-lasting prevention: protects for up to 8 months without the need for additional treatments.
- Water-resistant: remains effective even after bathing or exposure to rain.
This controlled-release system minimizes direct contact with the product and reduces the risk of adverse reactions, ensuring constant protection without loss of effectiveness.
Advantages of the Seresto collar for large dogs
The Seresto collar offers multiple benefits that make it one of the best parasite control options for large dogs:
- Long-lasting protection: up to 8 months of effectiveness against fleas and ticks.
- Effective against larvae and eggs: breaks the parasite life cycle.
- Odorless: ideal for dogs and owners sensitive to chemical smells.
- Water-resistant: does not lose effectiveness in rain or occasional baths.
- Safe and comfortable: adjustable design without hard edges to prevent discomfort.
Additionally, as it does not require monthly applications, it is a practical choice for owners with limited time or dogs that are difficult to handle.
How to properly fit and use the Seresto collar
To ensure maximum effectiveness of the Seresto collar for large dogs, follow these recommendations:
- Fit it snugly but leave enough room to insert two fingers between the collar and your dog's neck.
- Trim any excess length to prevent the dog from chewing it.
- Do not remove the collar during the protection period, unless advised by your vet.
- Avoid combining it with other parasite treatments without veterinary guidance.
The collar starts working within a few hours, and its protection is continuous as long as it remains in place.
Frequently asked questions about the Seresto collar for large dogs
Is the Seresto collar safe for large dogs?
Yes. The Seresto collar for large dogs is formulated specifically for dogs over 8 kg (17 lbs), with an active ingredient dosage adapted to their size. It uses imidacloprid and flumethrin in a controlled release that minimizes exposure and reduces the risk of adverse reactions. When used according to the manufacturer's instructions and ensuring the dog is not allergic to its components, it is safe. It also includes a safety-release mechanism to prevent accidental choking if snagged.
Does it protect against leishmaniasis?
No. The Seresto collar is not designed to repel sandflies (phlebotomines) that transmit leishmaniasis. It targets fleas, ticks, and lice. For leishmaniasis protection, consider alternatives like Scalibor or Preventic, which have proven effectiveness against sandflies. In high-risk areas, combine parasite protection with additional vet-recommended measures.
How long does it take to work?
The collar begins killing fleas within the first 24 hours and ticks within 48 hours after application. For complete protection, apply it before the start of peak parasite season. Its effect is continuous thanks to the constant release of active ingredients.
Is it water-resistant?
Yes. The Seresto collar is water-resistant and remains effective after occasional baths, rain, or play in wet areas. However, very frequent swimming or use of antiparasitic shampoos may slightly reduce its duration, so in such cases, monitor the replacement schedule.
How long does its protection last?
It offers continuous protection for up to 8 months against fleas and ticks, as long as it is worn without interruption. In very hot climates, with heavy infestations, or with frequent water exposure, some vets recommend replacing it after 6–7 months to ensure peak performance.
Can it be combined with other parasite treatments?
In most cases, yes, but always under veterinary guidance. In high-risk environments with internal and external parasites, combining the collar with other methods may be beneficial. However, to prevent overexposure to active ingredients, dosage and timing must be carefully managed.
Does it require maintenance or checks during use?
Yes. While the collar works continuously, it is advisable to check every few weeks to ensure it still fits correctly, especially in young or growing dogs. Clean the neck area periodically and check that no dirt build-up is affecting the release of active ingredients.