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Seresto

Seresto 8-Month Flea & Tick Collar for Small Dogs Under 18 lbs., 1ct

  • Based on 55,157 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Oct 27
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Size: 1 Pack


Features

  • Vet-recommended, premium flea and tick protection for dogs and puppies without the price tag
  • Long-lasting flea and tick collar kills and repels fleas for 8 continuous months
  • Seresto is veterinarian recommended flea and tick collar
  • Starts working within 24 hours to kill and repel fleas by contact so pests dont have to bite your dog to die
  • Hassle-free, non-greasy, easy-to-use flea and tick protection

Description

Give your dog long-lasting protection against fleas and ticks with a Seresto Small Dog flea and tick collar. Unlike other flea and tick protection, Seresto small dog collars kill and repel fleas and ticks for 8 continuous months. Seresto collars make your dog’s comfort a priority by killing fleas and ticks through contact, so pests don't have to bite your dog to die. Existing fleas die after 24 hours of initial application of the collar. After 24 hours, any new fleas on the dog are killed within 2 hours with protection against further flea infestation lasting 8 months. The prevention of infestations with new ticks starts at 48 hours after application of the collar. 48 hours after application, any new ticks are repelled and/or killed in as quickly as 6 hours. Seresto small dog collars protect against common pests like deer ticks, American dog ticks, brown dog ticks, and Lone Star ticks; they're also effective against chewing lice for 8 months. Fleas and ticks not only cause discomfort; fleas can transmit bartonellosis or tapeworms. Ticks can transmit Borrelia burgdorferi, which causes Lyme Disease. Check the product label for information on potential side effects. Seresto small dog flea and tick collars are for dogs at least 7 weeks old and up to 18 pounds, and no prescription is needed. They're odorless, non-greasy and water- resistant to swimming, exposure to rain or sunlight, bathing, and shampoo treatment. Seresto is a trademark of Elanco or its affiliates. Seresto small dog 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 8-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. Brand Story By Seresto P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Manufacturer Contact Information For any technical issues contact manufacture at See more

Brand: Seresto


Item Form: Collar


Scent: Unscented


Item Weight: 3.52 ounces


Active Ingredients: Imidacloprid, Flumethrin


Item Volume: 31.64 cubic inches


Allergen Information: Allergen-Free


Dog Breed Size: Small


Unit Count: 1 Count


Color: Gray


Product Dimensions ‏ : ‎ 1.56 x 4.5 x 4.5 inches; 3.52 ounces


Manufacturer recommended age ‏ : ‎ 1 month and up


Item model number ‏ : ‎ 81857944


Department ‏ : ‎ Flea & Tick


Date First Available ‏ : ‎ January 28, 2013


Manufacturer ‏ : ‎ Elanco US Inc


Best Sellers Rank: #450 in Pet Supplies (See Top 100 in Pet Supplies) #2 in Dog Flea Collars


#2 in Dog Flea Collars:


Customer Reviews: 4.4 4.4 out of 5 stars (55,157)


Brand Name: Seresto


Unit Count: 1 Count


Age Range Description: 7 weeks and older


UPC: 688957294651 724089579447


Included Components: 1


Item Type Name: Collar


Manufacturer Contact Information: For any technical issues contact manufacture at


Manufacturer: Elanco US Inc


Model Number: 81857944


Manufacturer Part Number: 81857944


Warranty Description: No_warranty


Item Form: Collar


Scent Name: Unscented


Dog Breed Size: Small


Pet Type: Dog


Target Species: Dog


Item Weight: 3.52 ounces


Volume: 31.64 cubic inches


Allergen Information: Allergen-Free


Active Ingredients: Imidacloprid, Flumethrin


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Oct 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • It really works! Lasted 4 months!!
Size: 2 Pack
This really works. I ordered this in April for my 2 small dogs( Bischon Frise & Shitzu/yorkie mix). It is now September and I am just having to purchase a new one. They got their first flea literally last week. I can’t believe the collars lasted 4 months. My backyard is huge and surrounded with so many HUGE trees. Great price for the quality of protection. Do not hesitate to get this to keep your fur babies safe. ... show more
Reviewed in the United States on September 9, 2026 by Bianca Mincey
    • It works!
Size: 1 Pack
Review Image by Angelica Esquivel
It works! I put a large Seresto collar on my German Shepherd and a small on my chihuahua. No fleas at all a few ticks here and there on my German Shepherd but nothing major she is an outside dogs and is friends with the stray cats so a few ticks is to be expected. No smell easy to use no side effects the collar stays on. ... show more
Reviewed in the United States on September 3, 2026 by Angelica Esquivel
    • Best Collar and It works!
Size: 1 Pack
We have a Dachshund dog and this collar work very well got rid of the fleas and stops them from coming back,no more digging for our dog,it's a little pricey but well worth it. If your wanting a great collar get this one hands down.
Reviewed in the United States on September 20, 2026 by Donald
    • Works wonders on our dogs.
Size: 2 Pack
At least in our area, NW AL, we had a lot of issues with fleas that seemed immune to all the name branded flea treatment drops and we won't give our dogs the pills, due to side effects. So we were constantly fighting with fleas. Dog bathing constantly; treating beds, blankets, and carpet on a regular routine and still having issues. We powdered our carpets even, it was ridiculous! However, we had heard great things about Seresto and figured it was worth a try. It seems like a lot of money, but really it comes out the same or cheaper. We gave it a try, even though we replaced them after 6 months, it was due to the flea population booming and wanting to make sure they stayed protected throughout the entire warm "flea" season. We in no way regret switching to these collars. We no longer have to constantly fight fleas on our animals or in our house. We may occasionally see a flea, right after one of the dogs come back in but they die quickly. We thankfully do not have a tick problem where we live, due to our free range chickens, who keep them at bay. So I cannot speak for the quality of tick prevention. However, from other reviews I have seen, I would gather it works pretty well also. As a note, we do have an indoor cat and a pet rabbit. The dogs can and do carry fleas in still, so we treat our rabbit and cat separately with drops. Definitely worth every penny for us. As it has, in the end, saved us hundreds per year because it works so much better! ... show more
Reviewed in the United States on August 23, 2026 by Jennifer M
    • Good product. Thanks but way too exspensive.
Size: 1 Pack
Received quickly. Had to change bedding and spray house. But no fleas now. This is an inside pup.
Reviewed in the United States on July 18, 2026 by Patricis Lynne
    • Doesn’t work like they are supposed to.
Size: 2 Pack
Review Image by Amazon Customer
Review Image by Amazon Customer
Review Image by Amazon Customer
I purchased 2 of these Seresto collars on August 8. It was cheaper to buy two than to just buy one. The day I see these I put one on my dog. I am finding fleas on her and it’s not because she goes outside because she goes out very little, no other animals in my house these collars are not what they’re supposed to be. I am very unhappy with this and the seller they had to have known these weren’t full strength I’ve used them before never had a problem I have added three pictures. The first one is on the inside of the color you can see the white marks and the other two are on the outside of the collar in two different places and look at that white and gray white and gray last year I had one on her from the beginning of spring until in the winter and she never had anything on her and he stayed the same color. These are old collars. ... show more
Reviewed in the United States on September 8, 2026 by Amazon Customer
    • 0/10 Dangerous product health wise- allergic reactions in every animal we used them on.
Size: 1 Pack
Please be cautious of using these collars, we had a terrible expirence. My mom and I both purchased sets of these collars, for dogs and for cats using the appropriate species specific sets, as flea prevention. Both households have dogs and cats. In total we spent close to $150 dollars each and subscribed to auto renew the purchases due to the really great reviews. The first 2 days they seemed to work really well! We found some dead fleas on the dogs after they came in from outside and no living fleas anywhere. Day 3 my moms Labrador began itching himself constantly- mostly around his neck and back. Hes older with some food allergies so we at first thought he got into something (as hes notorious for eating trash and sneaking cat food) and did not connect it to the collar. We kept an eye on him and over night he developed large weeping sores everywhere the collar touched as well dry itchy spots along his back and chest. Those spots later developed into sores and the poor guy was miserable. Knowing he's prone to allergies we removed his collar and bathed him/treated the sores but left the collars on Every one else as they didn't react similarly and chalked it up to being a fluke due to his pre existing allergy problems. That was, however, not the case. Over the next 3 weeks everyone we put a collar on began digging/scratching themselves raw (4 dogs, 7 cats total between both houses). My oldest cat developed large weeping sores everywhere the collar touched and she did not previously have a history of allergies. Ive used collars on her in the past and she never had a reaction. She lost the fur around her neck (as of now about 2ish months later its still not grown back) and had a decreased appetite as well as becoming very lethargic. 2 other cats developed bald spots and sores on their necks where their collars touched while the rest continued to develop bald spots/red and itchy skin. I have two daschunds and at the same time that we discovered the balding/sores on the cats, my male daschund very suddenly developed Hemoragic Gastroenteritis. He previously had a clean bill of health but very suddenly became extremely lethargic, refused food and water, was vomiting and had bloody, jelly like stool. Wednesday night he went to bed fine, ate dinner and was playful. Thursday morning he refused breakfast, and by that afternoon/early evening he wouldn't move, eat, drink and his stool was entirely bright red blood. We removed all collars and rushed him to the emergency vet clinic- closest one being almost 2 hours away from us. He was hospitalized over night and required 3 more back and forth trips and an extensive medication regimen before he was finally on the mend. Speaking to the emergency veterinarian she could not 100% say that the collar caused the condition, as the condition itself is still largely unknown and seems to have many triggers. However she said allergies and allergic reactions have caused or triggered gastroenteritis before. Other causes can be parasitic infections, food allergies/intolerance, infections, certain viruses and exposure to certain chemicals. So while they could not 100% confirm the collar contributed to his health emergency they could not 100% rule it out either. He did not have parasites, any food changes or viruses at the time of his admittance. After a steep 2k vet bill and money for gas back and forth my dog thankfully seemed to make a full recovery and is doing well. My other dog expirenced some thinning fur on her neck but no sores or other health conditions. My moms other dog, a terrier, expirenced very red, painful and inflamed skin. He itched himself relentlessly but thankfully did not develop sores. Although he did seem to have a brief rash along his stomach and legs. This rash resolved shortly after removing his collar and routinely applying dog safe rash cream. In addition to the multiple allergic reactions and possibly related health emergency, the collars did not seem to work after a week. The dogs would come in from a walk or playing outside and we'd find several live fleas on them a piece. We live in an area where fleas have been horrible this year but its like after an initial week of success the fleas were suddenly immune to these collars. If you already have a flea infestation these collars will do nothing for you, they barely worked for prevention purposes alone. Over all, I urge anyone looking into using these collars to either try a different product all together or keep an extremely close eye on your pets and observe for an allergic reaction. I know every pet is different and every pet may have an allergy to a different flea med/preventative because they are essentially bug poison. But for a product meant to be used on animals we had way too many allergic reactions occur one right after the other and something is not right with either the entire product or at least the batch we received. During the time we used the collars we had no other changes happening that could have caused reactions. There were no food changes, all our animals were previously very healthy, only one animal (the Labrador) had a history of allergies and sensitive skin, there were no environmental changes, no new treats, no new shampoos/changes in bathing or anything else we could think of that would contribute to these reactions. In addition, the timing of my dogs sudden health emergency was extremely suspect. I can't with 100% confidence solely blame the collar, but I find it strange that a year old puppy with no parasites or pre existing health concerns or exposure to toxic substances would suddenly, in a matter of days, decline to the point of requiring a hospitalization. My family and I have unsubscribed and will personally not be using this brand of flea control again. It was a miserable, and very expensive, expirence for us and our pets that in the end did absolutely nothing to prevent or kill fleas. Please be very careful if you choose to use this product and monitor your pet very carefully in case they too expirence an allergic reaction or other health condition. ... show more
Reviewed in the United States on August 20, 2020 by Jourdan
    • Does its job
Size: 1 Pack
It definitely keeps ticks off my dog. I live in a highly infested area and ticks are magnetized to my dogs and family. This thing is absolutely necessary. I've tried Bravecto, and it worked well. However, it's very expensive and only lasts a few months. This was cheaper and lasts the whole tick season. It's a bit rigid and doesn't completely form to my dogs neck. The end comes out of the loop sometimes and sticks out. It stays on, the clasp part works well, it's just a bit annoying to have to keep putting the end back through. At first, my dog really didn't like it. Although, he is very sensitive to wearing anything. I thought maybe it was bothering him in a chemical way, but after some time passed, he seems to have gotten used to it. It has no odor or filmy feel which is nice. I've tried cheap, hardware store flea collars and they are gross. It does fit nicely around his neck and can be cut to shorten the length if needed. ... show more
Reviewed in the United States on June 25, 2026 by Jessica Goodway

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