Seresto Flea & Tick Dog Collars

Item #0040921


Seresto Flea & Tick Dog Collars

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  • Seresto Flea & Tick Dog Collars Image 2
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Seresto Dog Collar offers 8 months of protection against fleas, ticks, lice and aids in the treatment of sarcoptic mange 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

Three Rings of a Flea Circus

The three rings (of a flea circus) refer to how we effectively treat for fleas and the keys to prevention. It is important that when treating for (or for prevention of) fleas that we treat the pet, the home, and the yard. If you aren't treating all three, you might be wasting time and money. 


Seresto Dog Collars

Kills fleas within 24 hours and ticks within 48 hours after initial application. Re-infesting fleas are killed within two hours and reinfesting ticks on dogs are killed in as quickly as six hours. As the active ingredients wear off the dog. The flea and tick 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 the 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 Seresto Dog Collar is approx. 15" L (for dogs up to 18 lb)
Large Seresto Dog Collar is approx. 27.5" L (for dogs over 18 lb)

Active Ingredients: imidacloprid and flumethrin

View manufacturer and/or label information

Learn how to apply to your dog:

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


  • Brand: Bayer Animal Health
  • Type: Flea & Tick
  • Form: Collar

Reviews (73)

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  1. 5.0 out of 5 stars

    "These collars actually work!"

    The collars work well, but they are painfully expensive. I try to buy when they are on sale!

  2. 5.0 out of 5 stars

    "Seresto Collars"

    I live in Florida and the fleas here are hell at best. The first collars I ordered where great but the second time I was having issues with the efficacy of the collar. I called the company and they sent me Advantix for free to use with collars. I am ordering them again as I hate putting greasy spot on products and oral meds is an absolute never for my babies. I have seven dogs so this is really the most economical option as well.

  3. 5.0 out of 5 stars

    "Flea Collars"

    I have used these for several years on my small dogs. Never any fleas and they work longer than the 8 months for my dogs. Shipping took a little longer than expected.

  4. 5.0 out of 5 stars


    works great have 3 great danes and use this only for flea protection, it was recommended by my vet 3 yrs ago and never have a problem

  5. 5.0 out of 5 stars

    "3rd year using them"

    With just putting one on our Aussie each spring we have not had fleas in the house OR on our cats that don't wear them. Prior we were inundated. Constantly bathing cats and treating the whole house.

  6. 5.0 out of 5 stars

    "Best Collar Hands Down"

    I've used these with my Bostons for 3 years and love the protection afforded to them and us as they are in and out frequently. Now if they only made something similar for humans in the way of ticks, I'd get it for my husband! lol

  7. 5.0 out of 5 stars

    "Seresto Collars"

    I must be doing something wrong. I fit them on my two dogs over a week ago and still have ticks. No big ones, they are all small. Might be just new ones getting on the dogs. I'll keep an eye on them.

  8. 5.0 out of 5 stars

    "Excellent flea & tick protection "

    I order these dog collars yearly and they are excellent at keeping fleas & ticks away from my 5 dogs. Live on a horse ranch and the dogs go everywhere- woods, fields, water and trail riding with us. NEVER HAVE FLEAS OR TICKS! Awesome product!

  9. 5.0 out of 5 stars

    "Seresto Dog and Cat collars"

    I have been using 2 dog and 1 cat collar for 4 years and plan to continue making my animals comfortable by ordering the collars every 8 months. I cannot say enough on the quality of these collars and the comfort the collars provide my two dogs and 1 cat. Thanks.

  10. 5.0 out of 5 stars

    "Used these collars for 4 yrs"

    I have used this collar for my little one now for 4 years. 2017 I purchased them for my 2 cats and never had an issue with fleas or ticks. Will be purchasing again this year. I don't like putting that gunk on their necks and they hate it also. I am thankful for these Seresto collars. And we live in the country surrounded by pines which ticks just love.

  11. 5.0 out of 5 stars

    "Great flea collars"

    Great flea collar, all the fleas were off my dogs within 3 days. These will probably only last me about 6 months instead of 8, because my dogs are outside and love water. Still good collar for flea and tick control.

  12. 5.0 out of 5 stars

    "Seresta "

    Awesome product was recommended by my vet 2 yrs ago abd we have used only that since. We live on 5 ac and have 2 great danes

  13. 5.0 out of 5 stars

    "100% effective! "

    For 4 to 5 years now our 2 dogs and 1 cat have worn these collars. We've seen NO fleas or ticks on our pets since using the collars! So much easier and safer than using a monthly flea topical! And this works non-systemically, too!

  14. 5.0 out of 5 stars

    "Flea collars"

    Seresto flea collars work very well. I've used them for 3 years now and never had a bad reaction to them.

  15. 5.0 out of 5 stars

    "These Are The Best!"

    I love these collars. I use them on my LGD's and they keep them flea & tick free for about 6 months. I got these on a special Black Friday deal, my only complaint is the regular prices.

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