Seresto Dog Collars

Item #0040921


Seresto Dog Collars

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Seresto Dog Collar offers 8 months of protection against fleas, ticks, lice and aids in the treatment of sarcoptic manage on dogs and puppies 7 weeks and older. Available in small (15") or large (27.5") Read More

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Featured Advice from Our Experts

Itchy Dog: Causes and Solutions

Itchy skin, excessive scratching, persistent licking, hot spots, rashes, ear problems, face rubbing, skin redness, paw chewing, irritable behavior, scabbing, low energy and loss of hair! WOW… quite a list of behaviors that might be driving you and your dog crazy!


Seresto Dog Collar

The Seresto Dog Sollar kills fleas within 24 hours and ticks within 48 hours after initial application. Re-infesting fleas are killed within two hours and re-infesting ticks on dogs are killed in as quickly as six hours. As the active ingredients wear off the dog. The collar replenishes the hair and skin with a new supply of active ingredients, providing continuous protection against fleas and ticks for eight months.

Repels ticks, preventing the tick from attaching and transmitting disease-causing organisms. Bayer's Polymer Matrix is designed to slowly and continuously release the active ingredients (imidacloprid and flumethrin) for 8 months. Includes optional reflector clips that can be attached to collar for safety at night.

Features & Benefits:

  • no need to remember monthly applications
  • non-greasy
  • odorless
  • easy to use
  • water-resistant*
  • repels ticks on dogs and prevents diseases
  • for use on dogs and puppies 7 weeks and older
  • small dog collar has "break-away" notches for safety
  • includes optional reflector clips for visibility at night

Small Dog collar is approx. 15" L (for dogs up to 18 lb)
Large Dog collar is approx. 27.5" L (for dogs over 18 lb)

Active Ingredients: imidacloprid and flumethrin

* Bathing or swimming more than once a month could result in a shorter active period for the collar.

View manufacturer and/or label information

Learn how to apply Seresto to your dog:

Not eligible for multiple discounts!


  • Brand: Bayer Animal Health
  • Type: Flea & Tick
  • Form: Collar
  • Dog Size: Small Dog (under 18 lb), Large Dog (over 18 lb)

Reviews (46)

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  1. 5.0 out of 5 stars

    "great protection"

    I have always used Advantix and decided to switch as this is so much easier and less messy and lasts longer.

  2. 5.0 out of 5 stars

    "seresto collar"

    you name it I tried it.The only product to work 100 percent on all 5 of my dogs. not one flea or tick. We live in wooded land and have breeds from long hair to short hair, excellent product.

  3. 5.0 out of 5 stars

    "seresto flea collar"

    my great dane had fleas when i took her to the vet's for a check up, the vet suggested Seresto, I had never tried it before and was shocked to see how expensive they are, BUT when you realize that they last 8 months, its not that expensive, THE BEST PART is they WORK, I have 2 great danes and 1 dane/mastiff and i put all 3 on the collars and its great. WORTH EVERY PENNY

  4. 1.0 out of 5 stars

    "Not as good as they used to be"

    For several years I have bought this for my dogs. However, this year I bought them in April that lasted until August. I bought more in September and they didn't work at all.

  5. 5.0 out of 5 stars

    "great stuff"

    never had a flea/tick collar that worked until this one. took a few days but no more fleas or ticks!

  6. 5.0 out of 5 stars

    "It works!"

    In Florida the fleas are formidable, but no match for the Seresto collars. They are expensive, but worth the money.

  7. 5.0 out of 5 stars

    "Works great but have to give a a few months"

    I left a review in July when I first bought the collar but now I want to give an update. At first I believed that the fleas were dead after a week or so but then a month later- I was still finding a few fleas so I called Jeffers and said I want my money back. I was referred to The Seresto Company and they refused at that time. I was told that if I still had fleas after three months then they would let me return the collar. So I marked my calendar and after three months there are NO MORE FLEAS! Believe me, I looked. So I must say I am very impressed with this flea collar. Give it enough time and it works great!

  8. 5.0 out of 5 stars

    "5 month still works great"

    I have this on my dog and all three Barn cats. works great but if you pet goes into infested area it takes few hours to kill them. nothing is a miracle cure. treating house and yard is also important. prevention is allot easier than treating. this saves a lot of money and you don't have to redo every month..

  9. 4.0 out of 5 stars

    "It works but not as fast as they claim."

    The first 4-5 days the dog was wearing the collar - I was still seeing fleas on the dog and even right under the collar. They were lethargic fleas - but alive. It has been three weeks now and I can't find any more fleas alive or dead and my dog is not scratching anymore.

  10. 5.0 out of 5 stars

    "Works great"

    I previously used flea and tick spot on from the veterinarian, but it got so expensive and the dogs and cats hated it. I just bought my first Seresto collar and it works great and my dog didn't hide from it! We live on a farm and it works great even with them going in the tall grass fields and woods.

  11. 1.0 out of 5 stars

    "Carlos "

    No Flea month! Two month - fleafleaflea.

  12. 5.0 out of 5 stars

    "So happy"

    I love these..I use to swear by frontline but I guess there were never fleas around. Everyday my dog had more on him so I bought this. After 2 days no fleas. I am so happy with these collars. I got another dog and the first thibg I did was order one for him. The price is very good too

  13. 5.0 out of 5 stars


    I previously used flea and tick prevention I purchased from my vet but the cost was getting too expensive. These collars work. I live on a farm and my dogs are always in the woods or in the fields. No fleas or ticks!

  14. 5.0 out of 5 stars

    "Seresto Flea and Tick collar"

    I have 5 large dogs that stay outside and run in the woods and tall grass. We live on a farm and this is the best thing I have ever found. They kept all my dogs tick and Flea free for a year!!!

  15. 5.0 out of 5 stars

    "good collar"

    Our poor guy was chewing himself raw , it did take longer than 12 hours to kill them but he is now bug free and a happy camper Thank You Bayer for Seresto ! and thank you to Jeffers Pets for prompt service !

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