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  6. Seresto Small Dog Vet-Recommended Flea & Tick Treatment & Prevention Collar for Dogs Under 18 lbs.|8 Months Protection

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Seresto Small Dog Vet-Recommended Flea & Tick Treatment & Prevention Collar for Dogs Under 18 lbs.|8 Months Protection Video
Seresto Small Dog Vet-Recommended Flea & Tick Treatment & Prevention Collar for Dogs Under 18 lbs.|8 Months Protection Video

Seresto Small Dog Vet-Recommended Flea & Tick Treatment & Prevention Collar for Dogs Under 18 lbs.|8 Months Protection

Item: 83857944
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Make your dog's health and comfort a priority with the long-lasting protection of the Seresto Small Dog flea and tick collar. Unlike other flea and tick protection, Seresto Small Dog flea and tick collars are vet-recommended, stocked by 8,000 vet clinics,* and have been trusted by pet owners for nearly a decade to successfully kill and repel fleas for eight continuous months.

The Seresto Small Dog collar works to kill pests on contact within 24 hours of application, eliminating them before they bite your dog or lay new eggs.

Seresto Small Dog collars are for dogs at least 7 weeks old.

Seresto Small Dog is a trademark of Elanco or its affiliates.

*Elanco Animal Health, data on file

Key Benefits:

  • Vet-recommended, premium flea & tick protection for dogs & puppies without the price tag
  • Long-lasting flea collar kills & repels fleas for 8 continuous months
  • Seresto is the #1 selling non-prescription flea & tick brand, stocked by 8,000 vet clinics (Elanco Animal Health, data on file)
  • Starts working within 24 hours to kill & repel fleas by contact so pests don't have to bite your dog to die
  • Hassle-free, non-greasy, easy-to-use flea & tick protection


Seresto Flea & Tick Collar for Dogs

Flumethrin* 4.5%
Imidacloprid 10.0%
Total 100.0%

*Trans Z-1/trans Z-2 ratio: max 66% trans Z-1 and min 34% trans Z-2

Useful Information

One collar per animal to be fastened around the neck. Remove the collar from bag directly before use. Unroll collar and make sure that there no remnants from the plastic connectors inside the collar.

seresto dog collar instructions

  1. Insert end of the collar through the buckle. Adjust the collar around the animal's neck without tightening it too tight or leaving it too loose.
  2. As a guide, it should be possible to only insert 2 fingers comfortably between the collar and the neck.
  3. Pull excess collar thru the loop(s). Collar length of greater that 1 inch (2 cm) beyond the loop(s) should be cut off unless it is on a growing puppy, where some additional length may be needed for adjustment as the animal grows.
  4. After application of the collar, three reflector clips may be fixed permanently to the collar to increase the animal's visibility in the dark. Take the clips out of the bag. The clips should be evenly distributed on the non-overlapping part of the collar. The clips are correctly applied when a clicking sound is heard. For safety reasons once the reflectors are fixed to the collar the clasp closes permanently and cannot be re-opened.

Video Example of Collar Application

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. Rarely, mild application site reactions may occur, such as scratching, redmess and hairloss, which usually recover within 1-2 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, immediately. If your animal is on medicaiton, consult your veterinarian before using this or any other product.This collar is designed with a release mechanism. In the unlikely event of a dog being trapped, the dog's own strength is sufficient to widen the collar to allow for quick release. Replace the collar after 8 months for optimal tick and flea protection.

It is a violation of federal Law to use this product in a manner inconsistent with its labeling. Do not contaminate feed or food.

Occasionally slight itching may be observed in animals that are not used to wearing collars in the first few days after fitting. ensure that the collar is not fitted too tightly. Slight hair loss and mild skin reactions due to the mechanical irritation of the collar may occur at the application site which usually recover within 1 or 2 weeks without the need for collar removal. For further guidance regarding individual animal sensitivities. In case of loss of collar, a new collar may be applied immediately. Do not attach a leash to the collar as this may cause breakage.

Storage Directions

Keep the collar in the bag and in the outer packaging until use. As with any pesticide product, do not allow small children to play with the collar or reflectors, or to put them into their mouths. Avoid contact with eyes, skin or clothing. Wash thoroughly with soap and cold water after fitting the collar. People with sensitivity reactions to the ingredients of the collar should avoid contact with the collar. Choking hazard. Contains small parts. Do not place collar or reflectors in mouth. Not intended for use on humans.

For external use on dogs only. Do not use on other animals. Do not use on puppies under seven weeks of age. Do not get this product in dog's eyes or mouth. As with any product, consult your veterinarian before using this product on debilitated, aged, breeding, pregnant, or nursing animals. Individual sensitivities, while rare, may occur agter using ANY pesticide product for pets.

The Bayer Polymer Matrix System ensures that both active ingredients are slowly and continuously released in low concentrations from the collar towards the animal. This avoids peak concentrations and ensures that concentrations of both active ingredients are present in the dog's haircoat during the entire efficacy period. The active ingredients spread from the site of direct contact over the entire skin surface.

Seresto® FAQs

When can I bathe my dog after application of Seresto® for dogs? We recommend bathing BEFORE applying product. 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. There is no need to remove the collar for bathing. Please use a non-stripping, pet shampoo.

How often can I allow my dog to swim when using Seresto® for dogs? 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. 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. There is no need to remove the collar for swimming.

How often can I bathe my dog when using Seresto® for dogs?

  • We recommend bathing BEFORE applying monthly product. The product can be applied once the pet is towel dried.
  • We suggest using non-stripping shampoos that are specifically designed for use on pets.
  • 'Non-stripping' shampoos are generally soap free formulations designed for general cleansing. Bayer makes a variety of shampoos that are non-stripping, general cleansing shampoos.
  • 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. There is no need to remove the collar for bathing.

Customer Reviews

Review Summary
281 Reviews
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86% Recommend this product (242 of 281 responses)
By Wendy W.
Cohocton NY
Our large dogs love them!
June 27, 2022
When I was asked to do a review an to comment on the collars I purchased for my dogs I knew it was going to be easy. We have been using Seresto dog collars for about 11yrs now an we haven't seen any kind of flea, or tick, not even a mosquito on our dogs! Even when our St. Bernard was a baby an rolled in the dirt, fresh cut grass, or played in the dryer leaves in the fall there wasn't any issue! Or not even wen my German shepherd/Rottweiler mixed breed jumped in our pond an our St. Bernard jumped in after them an got the collars wet we never had a problem! They are wonderful! Please buy this product for your dog they deserve it
The reflectors fall off an dont stay attached to the collars very long.
By Ken
Best tick and flea protection and related diseases
February 16, 2022
We live in a rural area with lots of wooded and high grass areas and lots of deer with black-legged ticks. I've been using Serosto collars for years, and my dog never had a tick or flea.

I chose Seresto as it kills ticks and fleas before they bite the dog, so no chance of disease transmission. Most other products make animals' blood poisonous and ticks and fleas have to bite to get poisoned and die. Biting allows the transfer of diseases. Also, I do not want poisonous chemicals in my dog's blood.
By Dana
Irondequoit, NY
Works great
December 22, 2021
Love Seresto for my dogs. I always hated the topical treatments that left my dogs feeling greasy. Since being Seresto I have never seen any fleas or ticks on my dogs.
No greasy mess, put it on put the sticker on my calendar for reorder and done. Nothing love this product.
By Emily D.
Item as Described & quick to Ship
November 22, 2021
This item was exactly as described. Works great for dogs 18lbs and up. Item arrived quickly. Will definitely purchase again..
By Biskits B.
Olympic Peninsula
Resilient Fleas Take More "Artillery"
August 17, 2021
It seems like the fleas are tougher every year, so just a flea dip won't do the job of keeping them off the pups. A good shampooing with "herbal" anti-flea shampoo and rinse with a similar dip is good to kill the buggers that are on the pups, but once they are dry, a Seresto Flea Collar will help extend the relief. Seresto collars are sturdy and the buckles don't slip so they stay the right size. They also come with fantastic little reflectors to add on so dusk-'til-dawn walks along the street are even more safe and enjoyable.
easy, hands-off extension of relief from fleas extra reflectors from dark-time safety non-slide buckles to maintain the correct size not really a "con", but do check with your veterinarian to be sure your pup isn't unusually sensitive to the compound that does the anti-flea job
By Susan
Covina, CA
Protected my dogs in heavy tick infestation
May 19, 2021
Last fall I was fighting a Brown dog ticks infestation indoors. Topicals weren't working to protect my dogs at all. I was pulling dozens of ticks off them daily. Bombing the house and spraying indoors and out. As soon as the collars went on my dogs the ticks around them died. No more ticks latching on to suck their blood. The ticks went away in my house by December. So I thought! They suddenly reappeared or rose from the dead just before Easter. No doubt they went inside the walls or other hiding places to come out again in the spring. My dogs have remained tick free since Nivember when their collars went on. My 17? year old German Shepherd, Zoe passed in March so I will only be ordering two collars this time. I'm grateful that her last few months she was happy and didn't have to be drained by blood sucking parasites or have me constantly pulling ticks off her. Hoping the tick cycle will be broken soon as I am still finding hundreds of dead and live ticks looking to feed. Highly recommend this product. Nothing else worked and I didnt want to use an oral medication.
Works fast, no odor, highly effective in killing ticks. Very safe for use on my 3 senior dogs. Tired of people saying they can cause neurological issues, etc. Since the negative article came out. I don't even listen to that nonsense. It's still annoying to hear about that.
By Ellen A.
Fort Worth
Seresto Collar
May 14, 2021
This collar is for my 60# Black Lab. My choice for flea control for my girl has always been a Seresto collar. Entirely Pets had a great price and delivered it quickly.
Seresto collars last 8 month, and there is no messy monthly application.
By Judy S.
Clremont, NH 03743
Seresto Flea & Tick Collar f or small Dogs
December 22, 2020
I have used Seresto Flea& Tick Collars for all my dogs. They have worked very well, and I will always put a Seresto Collar on because I want my precious Pebbles protected. We have deer in our are, and other tic carrying animals. She has never had a tick in her eight years.

The only thing that is hard for me, I am 73, that when I have to take it off her when she goes to be groomers, I have a very hard time pulling it apart. I finally get it out, but it is a real struggle. Other than that, I have peace she is safe and protected.
By Stacy
Very Effective
November 13, 2020
Has worked great to keep ticks from attaching.
No ill effects for my mini Aussie A little pricey. Works for about 6 mo., not 8 mo.
By Wendy
Fairhaven, MA
Fantastic Buy
November 12, 2020
Can't say enough about this collar. The only ticks that I find on my dog are dead ones and there are many of those.
By Sherry
Frazeysburg, OH.
Great buy
May 4, 2020
Used this last year and it worked great.
By Sue
New York
Seresto Collar
April 15, 2020
Great product, affordable.
Merchant Response:Thanks! 8 months of flea protection for that price, we love it too.
Works great!! None
By Ashley
Hannibal, NY
Seresto Fan for Life
April 10, 2020
I started using the Seresto collars 2 years ago as my dog is a Lyme survivor and we live in a heavily populated flea and tick area. We've not had success with other topical treatments. With using Seresto I have found 1 dead flea and 2 dead ticks on my boy - and they were small - they did not bite him! This site gave me a great sale price and shipping rate. It arrived quickly too.
Merchant Response:Lyme is no joke. Thank you for your testimonial, Be safe Ashley
Easy to use, great price, no side affects, no chemical smell Getting it off for bathing
By Sharon C.
Very pleased
April 8, 2020
Betsy is so happy to have Seresto collar. No fleas no ticks!!!
Delivery was also fast
Merchant Response:Any time Sharon
By Tinman68
Long island ny
Best Flea and tick collar on market
March 25, 2020
We buy this collar every year for our dog never had a flea or tick on our dog outlast all other collars on the market
By Larry
Soddy Daisy, TN
Seresto Dog Flea and Tick Collars worked well for my pets last year...
March 17, 2020
This was my first online pet order with and it went without a hitch. They had a special discount code for the collar and they shipped quickly. Couldn't ask for more than that...
Great Price... Quick To Ship... Friendly website... None that I noticed...
By Peggy
Great flea protection
March 12, 2020
This is the best flea and tick protection!
I used to put the liquids on my dogs necks but didnít like the idea of the poison absorbing into their bodies. None of my dogs have had fleas or ticks while wearing this collar. And itís waterproof too.
No chemicals in my dogs bodies And the collar protects for 8 months. You don?t have to remember to give your pet a pill or liquid every month None!
By Angela K.
Tennessee (TN)
Highly Recommend
March 12, 2020
Use this product for multiple types of dogs.. They work.. Highly recommend !
By Angela K.
Tennessee (TN)
Highly Recommend
March 12, 2020
I have used these collars for the last 2 years & they work! I have multiple size & types of dogs. Highly Recommend !!
By Diana
Rochester, NY
Seresto Collar is Recommended and Sold by my Vet's Office.
February 21, 2020
I have use the Seresto Collar on my 3 rescue dogs for 2 years now and not a sign of a flea or tick. I live in a heavily wooded area with deer roaming through my gardens and many other tick bearing animals. Plus, I was able to get a refund from the Seresto Company when my vet's office printed out a receipt proving I had purchased them.
By Alice H.
Washington state
So far, so good
February 12, 2020
One hour after putting the collar on, he stopped itching and scratching. Also, since the scratching and licking stopped, he doesn't smell, so I haven't had to bathe him but once a month.
Easy to apply. None
By Suzy P.
Northampton, Massachusetts
I wish I had used Seresto collars all along!
November 2, 2019
For the first time ever, this was the first year my two Chinese Shar-Pei pups didn't bring any ticks inside with them! ... Seresto definitely is worth the price. After I put a new Seresto collar on them, I add a reminder/alarm in my iPhone for 8 months in the future and it's that simple! Their veterinarian tightened up the collars on them and reminded me that you should be able to only put 2 fingers between the collar and your pups neck ...
Put the collar on your pet and you're set for EIGHT months! Easy to use, instructions with pictures comes with each collar. Each collar comes with 3-4 reflective snap-ons for the safety of your pet in the evening. Shine a flashlight & you'll find him! Reminder sticker included to put on your calendar when it?s time to change collars. Happy pups = happy mum It WORKS!! You must follow the guidelines when fitting the collar on your pet. Routinely check the collar because it will stretch a little. May need to adjust fitting. Slight chemical odor e we hen you first open the package ... but it goes away overnight.
By Pedro
Doesn't Work
June 17, 2019
I bought these collars for my 3 small dogs just for prevention as they are always clean, after a month I have found some ticks on them. Big waste of money, no solution.
Expensive and doesn't work.
Dundee, NY
Happy about results, 5 star
June 14, 2019
I have used them for a couple of years and with multiple animals have no problem with fleas or ticks, I will state the our area is prone to ticks and have known of several dogs with the lime disease, I would give them high marks
By Michael P.
LZ, Illinois
Dog sad to see his friends go
June 7, 2019
All fleas, ticks, chiggers, gnats, and other flying nemesis are gone. Dog has no one to talk to now. Thanks!
By Florian
Clarksville, TN
May 31, 2019
Easy to use. Not really sure how I will know that the collar works for the amount of time stated.
Easy to adjust and not messy. No way to tell when collar stops working.
By Kittn
Ches, va
Worked in the past
May 12, 2019
Having an awful time with fleas. Used seresto for years but this year not working as well ,having to retreat yard and house multiple times. At a loss as to what to do but keep flea combing
Easy Not as good as it use to be
By Kitty37
These really do the Job w/No Nasty Side Effects!
May 11, 2019
This is my second year using and I Love it.It really works and both of my Dogs have no side effects and the cost is Great!Thank you so much!!
By swoods46
Gouverneur, NY
Not impressed
April 25, 2019
Thought I'd try these collars even though I've had good luck with less expensive brands. About 2 weeks after putting the collars on my dogs, I was pulling ticks off both dogs. Not worth the money, they don't work as well as less expensive collars.
By Petie
Columbus Ohio
No fleas!
April 15, 2019
I have tried many flea collars before but Seresto from Bayer is the only one that I will buy,a little expensive for a little dog have to throw away over half of it wish they would come up with a way to fit a smaller dog and not pay so much for half of a collar to throw away,but love the collar will buy it again because it works the whole 8 months. Thanks!
Works Throw to much away

Questions and Answers

7 Questions & 6 Answers
from Georgia asked:
September 21, 2017
My infant daughter loves the dog, who lets her touch & play with her. I see it say to keep away from children--does this include while wearing the collar? I imagine daughter shouldn't stick it in her mouth, but what if she touches it or grabs it while the dog is wearing it?
1 Answer
Hi, your daughter can play with the dog, but she just can not tug on the collar. This collar has medication that helps keep the fleas and ticks away.††
Submitted by: Customer Service on August 13, 2019

from Goldsboro, NC asked:
November 6, 2015
My chihuahua mix dog weighs 18-19 pounds. Which size collar would be better for him?
1 Answer
The small collar should work if it fits his neck comfortably, otherwise the large should work fine. You can measure the circumference of your dog's neck or simply try the small collar for your dog to see if it fits. Alternatively, you can just pay a little extra to be assured that the large will fit on and work for your dog.
Submitted by: Customer Service on November 9, 2015

from West Monroe, New York asked:
September 27, 2015
How long do you have to wait until you don't see any active fleas?

from Central Texas asked:
May 31, 2015
What is the length in inches of the small dog and the large dog collars?
1 Answer
The length of the small collar is 15". The length of the large collar is 27.5".
Submitted by: Customer Service on June 2, 2015

William A
from Calais Maine asked:
May 19, 2015
I am wondering if I ordered a three pack would the collars last me out three years using one a years or do they have expired dates
1 Answer
There is no expiration date for the Seresto Collar. These collars last up to eight months after they are removed from their packaging.
Submitted by: Customer Service on May 20, 2015

from San Leandro, CA asked:
April 7, 2015
what do you do at bath time? take off or keep on?
1 Answer
From the Seresto website: "The active ingredients of Seresto® are contained within the Bayer Polymer Matrix, making it water-resistant. Therefore, it is unnecessary to remove the collar before the pet is immersed in water. Seresto® remains effective following a shampoo treatment, swimming, or after exposure to rain or sunlight. Under normal conditions, effectiveness lasts for eight 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 five months." Source:
Submitted by: Customer Service on April 8, 2015

from Leslie, AR asked:
March 29, 2015
Is there a difference in amount of ingredients between a small dog Seresto flea and tick collar and a large dg Seresto flea and tick collar or is it just the size of the collar that is different?
1 Answer
It appears that the collars are the same dosage but that the dosage applied to your dog varies based on the size of the collar, as both collars can be adjusted to fit your pet's neck exactly. Source:
Submitted by: Customer Service on March 31, 2015