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
You've Already Reviewed This Item
2358 Reviews
Showing 1-10 of 2358 Reviews
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Seresto dog and cat collars
By Weezie on Feb 22, 2021
I always buy these Seresto Collars for my 2 kitties and my Pomsky now.I LOVE SERESTO COLLARS!!! They actually last the whole 8 months. I used to buy Frontline Plus, Advantage, or Advantix and none of them were working anymore and my cats and pup still had fleas constantly. I never gave them a bath before applying it and had been applying it correctly and NOTHING mattered. I even offered them to family members to put on their animals and like I'm saying, they all called me and told me it wasn't working for theirs either so I know the problem isn't on my end.The makers of Advantage, Frontline, and Advantix, have disappointed me as they lowered their quality of these products, whatever they used I always buy these Seresto Collars for my 2 kitties and my Pomsky now.I LOVE SERESTO COLLARS!!! They actually last the whole 8 months. I used to buy Frontline Plus, Advantage, or Advantix and none of them were working anymore and my cats and pup still had fleas constantly. I never gave them a bath before applying it and had been applying it correctly and NOTHING mattered. I even offered them to family members to put on their animals and like I'm saying, they all called me and told me it wasn't working for theirs either so I know the problem isn't on my end.The makers of Advantage, Frontline, and Advantix, have disappointed me as they lowered their quality of these products, whatever they used previously that made them last for 30 days is long gone. They don't even work so please save your money. I still have a full 6 pack for each cat and dog and it's worthless, and I wasted over 150 dollars to treat all of my pets. The Seresto collars are so easy to put on and idk how they last 8 months but they do. I was very skeptical of the collars at first but my Mom had bought a collar for her kitties and was praising Seresto, and that is what made me switch. I leave it on my pup when I bathe her too. Trying to apply the little bottles of the flea treatment to my cats is a nightmare anyways. Separating the hair, and holding them still (pain in the butt) applying the flea drops, and as soon as they feel the liquid they try to bolt. It takes 2 people here to do this and we have battle scars from it. I'm saying all this and explaining in hope someone reads this before wasting your money on the drops to the neck. Go with the Seresto Collar and save A LOT of money and time and you don't have to apply every 30 days. In 8 months pop the collar off and slap on a new one and that's it. It may take a minute if that to pop the collars on. They also have little reflectors to snap on the collars so your fur babies are easy to see outside at night or dark places in your home. My yard is fenced around the house and my dog likes to hide in the bushes and was impossible to find at night. Not anymore. I just pop the flashlight up on my phone and find them easily now. If this doesn't convince you, you can go look at others reviews too and I'm sure they'd agree with me. 5 STAR product! … more
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Seresto works great!
By Chris on Feb 20, 2021
Living in the area that we do, with horses, a diary farm and wildlife in the area, fleas and ticks are a problem! Seresto has been a God send!! I have 2 cats and one dog they love to be outside in warmer weather and I tried everything to get rid of the fleas, but couldn't until my sister told me about these collars! Love them!! Plus, they are cheaper and easier then giving them the "treatments" every three months!
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Love these!
By Sarah on Feb 1, 2021
Our one cat got outside and brought fleas back with her, and unfortunately shared them with our 4 other animals. I tried everything, but we were getting overran with fleas. I tried sprays, other collars, bombs, flea lights and traps, but nothing worked. I was literally at my wits end. My poor little dog was getting bathed daily just to kill the fleas on her. I bought these collars for all 5 of them, and in less than 3 days, I didn’t see one flea in our house. I’ll never use anything again, these are a lifesaver!
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Chewy is an amazing company
By Becca on Feb 27, 2021
I ordered this product for one of my mother's cats. I was in a hurry while ordering and accidently ordered the seresto for dogs. They gave me a full refund and a discount on the product I actually needed. They did not want me to return the collar for dogs but instead to donate it to a shelter. love chewy and they're fundamentals of operation!
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Effective with vacuuming
By Rona on Feb 17, 2021
It’s been 4 months! So far so great!! I got one for my cat and another for my dog. The carpets and pets had fleas during the summer and nothing else worked. It helped that we vacuum every day and throw out the trash in the vacuum after each time! Just cut what you don’t need. Will try to update in two months see if it still is working
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Fleas are resistant to Seresto Products
By Tom58 on Feb 6, 2021
I believe it's fair to inform as many as possible about these Bayer products not working anymore. I've used Seresto collars since they first hit the market. For years I never saw a live tick or flea on my dog or cats. I swore by this product. We moved further down the east coast a couple years back and where I live now these collars have had zero effect from day one. Prior to our move I had noticed a decline in the efficacy. In our rapidly changing world I think there are mutation and resistance factors at play here. I've spoken to Bayer on a few occasions with little help other than sending me free stuff to hopefully shut me up. They suggest spraying the yard with more poisons. Go figure, Monsanto I believe it's fair to inform as many as possible about these Bayer products not working anymore. I've used Seresto collars since they first hit the market. For years I never saw a live tick or flea on my dog or cats. I swore by this product. We moved further down the east coast a couple years back and where I live now these collars have had zero effect from day one. Prior to our move I had noticed a decline in the efficacy. In our rapidly changing world I think there are mutation and resistance factors at play here. I've spoken to Bayer on a few occasions with little help other than sending me free stuff to hopefully shut me up. They suggest spraying the yard with more poisons. Go figure, Monsanto merged with Bayer a few years ago. I will never use a Monsanto product, I would rather comb out all seven of my kitties on a daily basis before I succumb to their evil ways. I hope this is helpful and feedback is appreciated … more
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Love this collar
By Bandit12 on Feb 10, 2021
These collars are so easy to use and very lightweight! My cats don’t like wearing anything so I had to look for something easy and this was it! They roughhouse a lot and the sweetest thing is if they pull them off, they bring them to me to put back on! My cats understand what they are for and would rather wear them than have fleas biting them all over!!!
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Works however not nearly 8 months..
By Tess on Jan 13, 2021
I am very happy with the results of these collars, I now have 3 happy cats. They were infested with fleas back in October and were scratching and miserable. I used frontline and it just didn't work anymore. Had a few friends recommend seresto so I tried. Got my 1st order in November and it is now middle of January and we have not seen one flea. It took a few weeks to catch the stragler fleas around the house but my cats are happy again and flea free. Recently as yesterday I saw 2 of my 3 cats scratching so I think its time to buy new collars again. They are expensive at almost $80. Each but they worked for at least 2 months NOT 8 like it said so I am giving 4 star..
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Works well for deer ticks
By NEcatlover on Jan 8, 2021
These seem to work well for deer ticks, unlike other products I've tried in the past. Our two cats love to venture outdoors to do a little supervised exploring in our brushy back yard, and before I started using the Seresto collars they were bringing tiny deer ticks into the house. With the collars, we don't find any ticks on them. I hate using pesticide collars but I've had Lyme disease once already so I'm not taking any chances. The cats seem to tolerate the collars very well, and I leave them off in the coldest months when the ticks are not so much of a problem.
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Love this collar!
By RustysMom on Jan 1, 2021
This flea collar is the best! My cat is an indoor cat, but I’ve harness trained him so he could go out and hang out for a while. There are tons of stray cats in the area since people feed them. And of course my Rusty has to go and roll in the dirt, grass and on the sidewalk. My neighbor has flea infestations every time she gets a new kitten or puppy (she goes through them like sand through your fingers) but we’ve not had any fleas or ticks at all. The collar does not irritate his skin either. I just wish this collar was cheaper!