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Seresto 8 Month Flea & Tick Collar for Small Dogs & Puppies (up to 18 pounds)

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With its innovative delivery system, the Seresto Flea & Tick Collar for Small Dogs & Puppies (up to 18 pounds) offers a breakthrough in tick and flea control for dogs for 8 months. Inside the unique polymer matrix of the Seresto collar are two active ingredients: imidacloprid, which has been used in products recommended by veterinarians for years to control flea infestations, and flumethrin, which effectively repels and kills ticks, larvae and nymphs. These ingredients work together in this unique flea collar to provide dual action against fleas and ticks like no other treatment!

Key Benefits

  • Easy to use 15-inch adjustable collar that is perfect for dogs 7 weeks and older that weigh up to 18 pounds
  • Kills fleas and repels and kills ticks to prevent transfer of organisms that cause disease
  • Provides continuous protections from fleas and ticks for up to 8 months
  • Non-greasy, odorless, water-resistant and easy to use
  • Comes with reflector clips to help keep your dog visible at night
  • Performance you would get from a topical treatment but in a convenient easy to use collar


The collar is designed with a safety-closure mechanism. In the unlikely event of a pet being trapped, the pet's own strength is sufficient to widen the collar to allow for quick release. ALWAYS read the entire product label prior to use. Wash your hands after handling collar. KEEP COLLAR OUT OF REACH OF CHILDREN.

See all items by Seresto

  • Item Number
  • Brand
  • Breed Size
    Extra Small, Small
  • Lifestage
    Puppy, Adult


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.

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Customer Reviews

Rated 4.6 out of 5 by 586 reviewers.
Rated 5 out of 5 by Better than I expected!! Where I live we have an unbelievable problem with fleas in our yard. I had never had any luck with flea collars in the past so I was not sure that I really wanted to pay a great deal of money for one and not really know if it would work either. I talked to my veterinarian first to see what his opinion was on the effectiveness of the collar and he highly recommended it. About a day and a half after putting this collar on my puppy he was flea free! You could literally see the fleas dying and falling off of him. It was unreal. I was ecstatic because I had done everything I knew to do and this was really a last resort. He still will pick up a few fleas when we take him out but the do not last long at all! Definitely definitely worth the money! And the best deal I have ever seen is ordering with chewy.com for this product! This company has to be the best I have ever ordered from. I have not had a single problem and I get my order in exactly 2 days everytime I have ordered. Love love love chewy.com and highly recommend the collar! November 10, 2016
Rated 5 out of 5 by Seresto collars are the best! Our poor little dogs never had a very big problem with fleas....until a new family moved in next door. They have 2 large huskies. No match for our long-coat chihuahuas. I tried everything to get rid of the fleas. Stuff on the yard, stuff on the carpets, and an unending parade of topical stuff on our dogs that did not work. A groomer suggested Seresto collars. Even though they were expensive, I decided that I needed to try them. My son cringed when he asked the price and I told him how much the collars would cost. But like I told him, if someone was taking care of ME, I would want them to do whatever they had to do to keep me comfortable. Guess what? THE COLLARS WORKED! The dogs were flea-less within a couple of days! I am a repeat buyer, and I will plan to buy more collars again when these get old...which is about 8 months. When you divide the initial cost over 8 months, the collars are really not so expensive after all. November 27, 2016
Rated 5 out of 5 by Longevity of effectiveness Greatest no mess flea/tick treatment. Our little cairn terrier is a very high strung girl. She's sweet and has such a devoted love for us, until we poke open, and come towards her with a liquid treatment, she snaps and growls. She's very sensitive to those, but when we bought this collar, it's very agreeable to her, plus no scratching, or any sight of fleas or ticks for 7-8 months. We love this collar. January 18, 2017
Rated 5 out of 5 by flea collar we have a dog that is allergic to fleas. 1 bite and she starts pulling her hair out. the cost of these collars are expensive at the vets and you sometimes have to wait for a rebate. we ordered ours for all 3 dogs for just about the price for 1 1/2 from the vets and got them in 2 days. Thanks for being so prompt. January 19, 2017
Rated 5 out of 5 by Great product for repelling fleas and ticks The Seresto collars work very nicely on my small dogs. The collars need to be appropriately tightened to the dog's neck for them to be effective. This is my second time to use the collars, and they do do a great job, and they do last for the 8 month time period as claimed. January 20, 2017
Rated 4 out of 5 by Good product Works really well. Less messy than the topical products . Safer than pills if your dog has a reaction you just take the collar off January 21, 2017
Rated 2 out of 5 by Old date Product is good but what was sent to me had an expired date January 22, 2017
Rated 5 out of 5 by No fuss No mess No fighting with our animals We have 5 dogs. Going to the vet for Trifexis is too expensive for all of my dogs. Seresto is fast and easy to apply. No pills and no liquid. Plus it comes with night reflectors. It lasts 8 months. Absolutely love it! January 19, 2017
  • 2017-01-23 T06:42:11.827-06:00
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