Seresto Flea & Tick Collar for Cats
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With its innovative delivery system, the Seresto 8 Month Flea & Tick Collar for Cats & Kittens offers a breakthrough in tick and flea control for your furry feline. This veterinarian-recommended treatment is specifically formulated to repel and kill fleas and ticks on contact with no painful biting required. Inside the unique polymer matrix of this easy-to-use, non-greasy, odorless collar are two active ingredients: imidacloprid to control flea infestations, and flumethrin to repel and kill ticks, larvae and nymphs. These ingredients work together to provide dual-action protection against parasitic pests for up to eight months!
Key Benefits- Veterinarian-recommended prevention treatment kills fleas and ticks on cats and kittens of all weights and 10 weeks of age and older.
- 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 in six hours; works on contact with no painful biting required.
- Easy-to-use 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 and sun exposure.
Read the entire label before use. Do not let children play with this collar.
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.
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Item Number61513
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UsagePrevention
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BrandBayer
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LifestageKitten, Adult, Senior
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Collar TypeFlea & Tick
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Product FormCollar
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Health ConditionFleas, Ticks
Active Ingredients: Flumethrin 4.5%, Imidacloprid 10.0%.
Use only one collar per animal. Fit collar around your pet's neck, allowing for 2 fingers to fit between the collar and your pet's neck to ensure a comfortable, yet snug, fit. Once collar is properly fitted, cut off any excess collar measuring 1" or longer. The collar should be worn continuously for the 8 month protection period. Check periodically and adjust fit if necessary, especially when puppies are rapidly growing. Keep the collar in the bag and in the outer packaging until use. Replace the collar after 8 months for optimal tick and flea protection.
Water Resistance: It is unnecessary to remove the collar before immersing your pet in water. Seresto remains effective following a shampoo treatment, swimming or exposure to rain or sunlight. In order to maintain an 8 month duration, pets must not be bathed more than once a month. For pets that swim once a month or more, the control duration is reduced to five months for fleas and seven months for ticks.
Where is this product sourced from?
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
I have never had a flea problem before. Where are my pets picking up fleas?
Fleas are very hardy pests that are quite capable of hitching rides on a variety of mammals. Wild animals or feral pets traveling through the environment may be a source for a pet’s exposure. Fleas may be brought to the house by:
- You – attached to clothing, luggage, dog blankets, etc.
- Your pet – any time your pet steps outside your house, they are potentially exposed to fleas, especially in areas where there are other animals.
- Stray or homeless cats and dogs – since these animals are not being cared for, they are easy targets for fleas. A single feral cat walking through your back yard even just one time may drop many flea eggs into the grass or under shrubs.
- Wildlife – particularly raccoons and opossums. These animals typically aren’t seen very often, because they are active at night. A single opossum can carry as many as 1,000 adult fleas! An opossum walking through your back yard even just one time can drop many flea eggs into the grass or under shrubs as they pass through.
- Non-treated pets in the household – most dogs are treated for fleas and ticks. Often, the cats in the household are not, especially if they are indoor only cats.
- Non-treated pets in the neighborhood – you may be vigilant about treating your pets for fleas, but your neighbor(s) may not.
What are the benefits of Seresto?
With its innovative delivery system, Seresto offers a breakthrough in flea and tick protection for dogs or cats for eight months.Features and benefits:
- For dogs or cats.
- Kills fleas.
- Repels and kills ticks. If a tick is repelled, it cannot attach and transmit disease-causing organisms.
- Non-greasy, odorless, easy-to-use.
How does Seresto work?
Inside the unique polymer matrix of Seresto are two active ingredients:
- Imidacloprid has been used in products for years to control flea infestations.
- Flumethrin effectively repels and kills ticks.Flumethrin works together with imidacloprid to provide dual action against fleas and ticks. No other treatment has this combination of ingredients.The active ingredients spread from the site of direct contact over the skin surface of the cat or dog.Sustained release technologySeresto works similarly to a monthly topical, but as the active ingredients wear off over time, a new supply is continuously replenished in low concentrations. The active ingredients spread from the site of direct contact over the skin surface.Bayer's polymer matrix technology is designed to slowly and continuously release the active ingredients for eight months, a duration that makes it clearly different from other flea and tick collars.
What if my cat or small dog gets stuck while wearing a Seresto collar?
Because some pet owners may be concerned that a cat or small dog could get stuck while wearing a collar, Seresto is designed with a safety release mechanism. In the unlikely event of the cat being trapped, the cat's own strength is sufficient to widen the collar to allow for quick release. A hard pull causes the ratchet-release mechanism to allow a widening of the collar. The small dog and cat collars are equipped with a predetermined breaking point. A harder pull triggers the breaking of the collar at this point.
- If your cat is not used to collars.
- Rarely, mild application site reactions may occur such as scratching, redness and hair loss, which usually recover within 1 to 2 weeks without the need for collar removal. In some cases, temporary collar removal and bathing may be recommended until symptoms have disappeared. In very rare cases, application site reactions such as dermatitis, inflammation, eczema or lesions may occur. In these instances, collar removal is recommended. If signs persist or become more severe, consult a veterinarian immediately.
What is the expiration date for Seresto for cats?
There is no expiration date required on the packaging by the EPA for this product. The product should be kept in its original packaging and stored as directed on the label.
How do I store and dispose of Seresto?
Do not contaminate water, food or feed by storage or disposal.
- Storage: Store in original unopened container in a cool, dry place that is inaccessible to children.
- Disposal: Dispose of container, pouch and expired collar in trash.

8-Month Protection for 9 Lives
Give your cat the long-lasting protection of Seresto. This easy-to-use, non-greasy, odorless collar kills and repels fleas and ticks for eight continuous months with proper use, so your feline has protection from these biting pests. Get the performance you expect from a monthly topical treatment in an economical collar for convenient, effective protection against fleas and ticks.
Continuous Release for Long-Lasting Prevention
With Seresto, fleas and ticks are killed through contact, with no biting required. The active ingredients stored within the collar release in low concentration with daily wear and are distributed over your cats skin and coat from head to tail for effective protection. 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 flea and tick treatments. It's easy to adjust for a secure fit and kills and repels ticks too. This is important because if a flea or tick is repelled, it cannot bite and transmit disease. Plus, the collar is designed with a ratchet-release mechanism and pre-determined breaking point.
Is Seresto the Right Choice for your Cat?
If your cat is always on the go or dislikes topical and oral medications, then the Seresto collar is a great option to help keep them protected. The Seresto collar provides pet owners with a convenient flea and tick preventative option that works continuously for eight months, eliminating the need for monthly reapplications.

Protection Your Pet Can Wear
Seresto brings convenience to every pet owner with lasting 8 month protection against fleas and ticks that's totally wearable. 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.
Seresto Cat Collar Features
Effective and Convenient Protection Against:
- Fleas
- Ticks
- Flea Larvae
Lasting Protection:
- Lasts eight continuous months
- Fights fleas and ticks through contact
- Sustained Release Technology provides a continuous supply of ingredients as your cat wears it
Easy to Use:
- Non-greasy
- Odorless
Active Ingredients:
- Imidacloprid
- Flumethrin
COLLAR FEATURES:
- Ratchet release mechansim and pre determined breaking point
- Optional reflector clips included for nighttime visibility
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 the protection she needs.

Customer Reviews
89% Recommend
89% of reviewersrecommend this product
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2405 Reviews
Showing 1-10 of 2405 Reviews
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For cats that can't use topical treatment
By Steph on Mar 27, 2021
The Seresto collar for cats is just great! Every pet reacts differently to medications. Our cat has trouble with most topical flea treatments (Frontline and Revolution). She has bad reactions each time like labored breathing, can't walk or stand, and gets very antsy. It's worrying to see her that way. She knows she feels weird all of a sudden (can't wash the stuff off herself, you know.) So, with that, the collar is awesome! It offers months long protection, doesn't smell funny, and she can get out of the collar if she's in a pinch. In the long run, it's not any more expensive than most topical. Unless you can't find the collar when they get themselves in a pinch! But that's part of owning a The Seresto collar for cats is just great! Every pet reacts differently to medications. Our cat has trouble with most topical flea treatments (Frontline and Revolution). She has bad reactions each time like labored breathing, can't walk or stand, and gets very antsy. It's worrying to see her that way. She knows she feels weird all of a sudden (can't wash the stuff off herself, you know.) So, with that, the collar is awesome! It offers months long protection, doesn't smell funny, and she can get out of the collar if she's in a pinch. In the long run, it's not any more expensive than most topical. Unless you can't find the collar when they get themselves in a pinch! But that's part of owning a cat. Highly recommend the collar! … more
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Tick/flea free outdoor kitties
By AmyVT on Apr 3, 2021
These work fantastic for my 7 outdoor cats! Especially, the one I can hardly touch. I'm glad Chewy is a reputable Seresto dealer that I can also recommend to pet owners I see at the clinic!! These help prevent ticks which prevent incurable Bobcat fever (Cytauxzoonosis) that's becoming more common in Illinois. Remember these collars need to be close to the skin to work properly. If you can get more than two fingers under the collar, it's too loose and won't work like it should!
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Love the collars!
By Seresto on Apr 8, 2021
We have used Seresto for our dog for two years so we decided to get some for our kitties this year. One of them (being the diva she is) scratched and licked at it so much that she made the collar cut into her skin. We took it off and out it on our other kitty and she’s doing fine with it on. I recommend testing how well your kitty wears collars before spending the money on this collar. It works WONDERS if your kitty will wear it.
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Concerns of authenticity
By LittleGuy on Apr 7, 2021
I'm a bit concerned about this product with all that's being said about Seresto. I talked with my vet regarding it. He is still very much for the collar..... but seems aware the are some fakes being sold.... that they are not from the Bayer Co. Told me to check the number with Bayer... but i had already disposed of my container. Can you Please confirm as to whether or not yours are actually from the Bayer Co.
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fur came off
By Emily on Apr 13, 2021
I have 2 cats. I put the collars on both of them a little over a week ago. With one of them her fur came off where the collar lays. There was also some scabs, but I’m not sure if that was from the collar or not. I haven’t noticed any behavior changes but I did take the collars off both of my cats to be safe.
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Great flea and tick protection
By JZimm on Apr 13, 2021
I love the Seresto Collars from my cats. They offer great protection for both fleas and ticks and I don't have to worry about a monthly application. My animals have never had any adverse reactions to the collar. Chewy has the greatest costumer relations people ever. I love dealing with them.
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Been using Seresto forever
By JoeT on Apr 8, 2021
Since we started using these collars we have not had any flea issues. I normally buy these in eary spring so they are fresh and ready for peak flea season. By late fall have found the threat of fleas in my area is low until spring for my indoor cats so I actually can get 12 months out of them.
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Works as advertised
By Carol on Mar 19, 2021
My cat is pretty cranky and hates to have any touching around her head and neck. The Seresto collar means that I only have to struggle once every 8 months to keep her protected. I started using the Seresto collar after she had a case of fleas and she has had no fleas since then. We both love this collar! Well, maybe she doesn't love it, but she knows that she is more comfortable with it on. lol
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This Collar really Works!
By Indymom on Mar 29, 2021
I love this flea collar for my cat! It even has reflectors to add to keep my kitty safe. No smell and cat doesn’t mind. It seems to work late March through winter months. Well worth the price and this I’d genuine brand name collar, not a knock off. I’m glad I read the internet info to help me verify genuine product
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Seresto Flea Collar for Cats
By TraceyK on Apr 2, 2021
This is the 3rd year for my Lily to have a Seresto collar. She is a maine coon with hair that is long and thick - I carried in fleas on my jean cuffs a few years back and had one heck of a mess in getting rid of her fleas - Seresto makes it easy....fleas will not live !!