Seresto Flea & Tick Collar for Dogs, up to 18 lbs

By Seresto
Rated 4.137 out of 5 stars
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Seresto Flea & Tick Collar for Dogs, up to 18 lbs, 1 Collar (8-mos. supply) slide 1 of 12
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Seresto Flea & Tick Collar for Dogs, up to 18 lbs, 1 Collar (8-mos. supply) slide 1 of 12

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About This Item

  • Veterinarian-recommended prevention treatment kills fleas and ticks on puppies and dogs 7 weeks and older weighing up to 18 pounds.
  • Starts to repel and kill fleas within 24 hours of initial application and re-infesting fleas within two hours; works on contact with no painful biting required.
  • Also repels and kills ticks within 48 hours of initial application and re-infesting ticks within six hours; works on contact with no painful biting required.
  • Easy-to-use, 15-inch adjustable collar is odorless and non-greasy; quick-release feature and visibility reflectors provide extra safety.
  • Water-resistant formula continues working for up to eight months, even after bathing, swimming and sun exposure.
Play Video: Learn More About Seresto From Our Team of Experts
Learn More About Seresto From Our Team of Experts

Important Information

Fleas rise to the top of your pet's coat as they die, so consider it a triumph if you start seeing more fleas at first, after treating your pet. If you’re still seeing fleas after application, it may be because your pet has picked up new fleas from the environment, which may include other pets, surfaces and outdoor areas. It may take up to 30 days to break the entire flea life cycle. Additionally, you should also treat sources of new fleas (i.e., carpet, yard, etc.) to ensure complete flea control.

About Seresto

Vet-Recommended Flea and Tick Protection

Help your dog lead the pack with long-lasting 8 month protection from Seresto. This easy-to-use, non-greasy, odorless collar kills and repels fleas and ticks for eight continuous months with daily wear, and can even help treat and control sarcoptic mange and lice. Get the performance you expect from a monthly treatment in an economical collar for convenient, effective protection.

Continuous Release for Long-Lasting Prevention

With Seresto, fleas and ticks are killed and repelled through contact, with no biting required. The active ingredients stored within the collar release in low concentrations with daily wear and distribute over your dog's skin and coat from head to tail for effective coverage. As the active ingredients wear off over time, the collar continuously replenishes the skin and coat with a new supply, for 8 continuous months.

Why Choose Seresto?

The veterinarian-recommended Seresto collar is non-greasy and helps avoid the inconvenience of applying monthly treatments. If fleas and ticks are repelled, they cannot bite and transmit dangerous diseases. It also helps to treat and control sarcoptic mange and kill lice. Seresto also doesn't interfere with your dog's regular collar and can easily be worn simultaneously.

Protection Your Pet Can Wear

Seresto brings convenience to every pet owner with lasting 8 month protection against fleas and ticks. Plus, Seresto works through contact which means fleas and ticks don't have to bite for the active ingredients to work. It's also available without a prescription, so it's just one less step to take care of.

A Little Water Never Slowed You Down

Seresto is water-resistant and remains effective following a shampoo treatment, swimming or after exposure to rain or sunlight. Under normal conditions, effectiveness lasts for 8 months. In order to maintain an eight-month duration, dogs must not be bathed more than once per month. For dogs that swim once a month or more, the control duration is reduced to 5 months for flea control and reduced to 7 months for tick control.

About Seresto

Seresto is manufactured by Bayer, a leading name in the healthcare industry for over 150 years. Seresto kills and repels fleas and ticks for eight continuous months in one easy-to-use, non-greasy, odorless collar. It effectively kills fleas and ticks and is veterinarian-recommended, so you can feel confident knowing that your pet is getting effective protection.
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Top IngredientsActive Ingredients: Flumethrin 4.5%, Imidacloprid 10.0%.Active Ingredients: Flumethrin 4.5%, Imidacloprid 10.0%.Deltamethrin, Pyriproxyfen.Deltamethrin 4.00%, Pyriproxyfen 1.00%, Other Ingredients 95.00%.Active Ingredients: Deltamethrin 4.00%, (S)-Methoprene 1.02%, Other Ingredients 94.98%...
Breed SizeExtra Small & Toy Breeds, Small BreedsMedium Breeds, Large Breeds, Giant BreedsLarge Breeds, Medium Breeds, Small BreedsAll BreedsAll Breeds
LifestagePuppy, Adult, SeniorPuppy, Adult, SeniorAdultPuppy, Adult, SeniorAdult
Collar TypeFlea & TickFlea & TickFlea & TickFlea & TickFlea & Tick

Questions & Answers

50 Customer Questions

Can my dog sleep with me while wearing the collar ?
Answer by ChewyJul 13, 2018
It is safe to allow pets to sleep in bed with you while wearing this collar. The active ingredients spread from the site of direct contact over the skin surface, so it is not recommended to continuously touch the collar.

Does the collar have to make contact with the skin to be effective? I have a Pomeranian with a very thick coat that would make it difficult for the collar to sit against the skin.
Answer by ChewyJul 05, 2019
The active ingredients in this collar dispense from the site of direct contact over the skin. If your pet has a very thick coat, it is recommended to trim their fur so that the collar has more contact and the ingredients are able to be absorbed.

Can this collar be worn alongside or under another, regular collar?
Answer by ChewySep 14, 2018
This collar may be worn in addition to a regular collar. It is important to make sure the other collar does not interfere with the Seresto collar as it needs to remain in contact with the pets skin to be effective.

Do you guarentee that this is a real seresto collat?
Answer by ChewyMay 07, 2020
We source all our products from manufacturer approved distributors or directly from the manufacturers. Chewy takes pride in ensuring that our furry friends’ wellbeing is always our top priority. We have worked hard to partner with all of the manufactures to deliver 100% authentic products.

ReviewsWrite a Review

Rated 4.137 out of 5 stars
2832 Reviews
Would recommend to a friend

2832 Customer Reviews

Rated 5 out of 5 stars
By Patsmom on Jul 31, 2022

Great product for our fur babies

After reading many negative reviews on this product I’m totally baffled at what could be going on and hoping that I don’t get some ineffective collars at some point. I’ve been using Seresto on my dogs for over 15 years and have had nothing but positive results. We take our Pomeranian to be groomed every 5 weeks and our 2 long haired Dachshunds every 10 weeks. Our groomer has never found one flea on any of our doggies so far. We do keep a close eye on them due to the stories we have read about pets that suffered bad side effects from the medication. It’s heartbreaking to read. I don’t think the cost of Seresto is any worse than other products because we get a good 8 months use out of one collar. Topical applications didn’t work well for us since one of my dogs always managed to go roll in some dirt because he didn’t like them. Washing the cost of those drops down the bathtub while bathing him almost made me cry! I sure hope that this continues to work so well for us and many others.

Rated 5 out of 5 stars
By Sylvia on Jul 1, 2022

Great Collar

This is the third Seresto collar I have used for my little chihuahua. I have tried other collars and they didn't work. I am very cautious with my Cocoa as he's sensitive and with him being so small I don't want somethimg that can kill him. I have heard too many horror stories from other pet owners that their pets have died from flea and tick products. My Cocoa don't like pills so I didn't want to go that route. My Cocoa's old seresto collar gave out and he got fleas. I bought another flea and tick collar and there were still fleas on my baby. So. I invested in another Seresto and he's wearing it, and fleas started coming to the top of his fur dying. Although; Seresto is expensive, it's worth the money to me.

Rated 1 out of 5 stars
By Charles on Jul 1, 2022

Will not buy again.

My husband and I were very hopeful that we could stop using monthly products on our dogs for fleas and ticks when we heard about these collars. We saw mostly good reviews and a few bad ones, but there are almost always a few bad reviews for anything. So we bought them. 2 small collars and 2 large collars. They were not cheap, but if they worked it was worth it. They did not work. Not even a little. The first week our dogs wore them we still saw fleas. I thought maybe they took a few more days, so I waited to see if anything changed. Nothing changed and now we are going to try something else. They may work for some, but all of our dogs are different breeds, different fur types, and all are house dogs. All had they same outcome.

Rated 1 out of 5 stars
By TerribleProduct on Jul 23, 2022

Would not recommend

This is the second year that these collars have not worked for my two small dogs. They are scratching constant and covered in fleas. One is currently getting a flea bath. I do not get the collars wet which was my recommendation from chewy. I take them off and put back on after my dogs are dry. This much money to continue to battle fleas

Rated 5 out of 5 stars
By Yvonne on Jun 21, 2022

Flea and tick collar

My dog is very picky. Won’t eat the Frontline Chews for flea and tick, so I had to resort to a collar. It seems to be working. Who can tell? It’s odorless and non-greasy. She does not mind the extra collar on her neck so I’ve got my fingers crossed. It seems to be working; no scratching or sign of any fleas or ticks. Have not had her groomed yet so I’ll see how that turns out. It is supposed to be waterproof with no need to remove. So, three weeks into its use I would say it’s effective and I’m giving it a thumbs up.

Rated 5 out of 5 stars
By Carol on Jun 14, 2022

Seresto Collar for Small Dog

I've used Seresto collars for my cats and dogs in the past. This time, I ordered a collar for my Pomeranian/Yorkie rescue dog, Maddie (also known as "The 14 Pound Ball of Madness"). It said for small dogs "up to 18 lbs" and although it fits around her neck, it latches at the first notch. It's a little close but its fine and there's room for my fingers to get under it. I also like that its thinner. Haven't seen any bugs on Maddie yet and she hasn't objected to wearing it, so I'm happy.

Rated 5 out of 5 stars
By Andrea on Jul 16, 2022


We got this for our chihuahua as flea season started to hit her and she started chewing her own fur. Within a week of putting it on her, her fur where she’d done this was improving and I haven’t seen her scratch once since we got it. We’re getting a second one for our lab now.

Rated 5 out of 5 stars
By Gary0529 on May 30, 2022

They work!

We are rural and overburdened with ticks-deer tick, brown dog tick and lone star tick. One of our dogs actually contracted Anaplasmosis (asymptomatic) but still required a 30 day course of expensive antibiotics even though he was on the monthly flea and tick pill. After removing numerous ticks off of him this year we spent the big bucks to get the Seresto collars--not a live tick found since then. Not only does it protect them but also us since I don't need to get Lyme's again from them bringing in ticks from the field into the house.

Rated 2 out of 5 stars
By LiaF on Aug 4, 2022

Barely worked for 2 months

Was very happy with this collar. - at first. It worked great for about two months and has seemed to stop working. For the price and the claim of 8 months use, don’t recommend.

Rated 1 out of 5 stars
By NancFlygirl on Jun 7, 2022

Not worth expensive cost?

Doesn’t seem to be working at all for my small dog. He has been wearing it for 3 weeks after getting a bath and all floors/bedding cleaned. Cat collars seem work on my cats but this is 2nd time trying this brand collar for my dog and I’m definitely disappointed especially since these collars are so expensive.