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Seresto Flea & Tick Collar

Seresto® Flea & Tick Collar

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As riders and online shoppers, we know it can be tough to buy a new bridle or pair of boots without trying them on. That's why we moved the fitting room to your living room (or barn)! From breeches to blankets, if you or your horse can try it on, you can return it, free! Just request a return with a FREE SmartPak return label from your Order History within 60 days of the purchase date. And of course, please make sure the item is in like-new condition with original packaging (we said 'fitting room', not 'war room'!).

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Begin with the zone for the state you are in. Dates shown on the map indicate suggested start and end dates for Fly Stoppers™ shipments. You may want to shift a zone if your elevation or microclimate is unusual, or if you fall on the border between two zones. You can start anytime during the fly season. Choose "Year Round" for climates that have flies all year, and start now.
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Why We Love This

The Seresto® Flea & Tick Collar is a unique polymer matrix collar that offers a continuous supply of two active ingredients: imidacloprid and flumethrin for effective 8-month protection against fleas and ticks. That's one convenient, non-greasy, odorless flea and tick collar instead of 8 monthly treatments.

The active ingredients are stored within the collar. They are released in low concentrations and are distributed over your dog's hair and skin surface for 8 months. As active ingredients wear off over time, Seresto® for dogs continuously replenishes the skin and coat with a new supply of active ingredients. Fleas and ticks are killed through contact with the active ingredients — no biting required.

*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 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 for flea control, and reduced to seven months for tick control.

Favorite Features

  • Adjustable sizing
  • Kills and repels fleas before they lay eggs
  • Kills and repels ticks
  • Provides odorless, non-greasy and easy-to-use protection
  • Aids in the treatment and control of sarcoptic mange on dogs
  • Kills chewing lice
  • Water resistant*
  • 100% Happiness Guarantee
    100% Happiness Guarantee
    At SmartPak, your happiness is at the core of everything we do. We put our products to the test in our barns and on our horses, and back every order with our world-class customer service so that you can shop with confidence. As part of our Happiness Guarantee, we promise you:
    • Expert advice from riders
    • Free shipping every day
    • Free return shipping on sized items
    • Hassle-free returns up to 365 days after purchase
(Maintenance Dose = )
Ingredient Amount
Small (15 inches - Dogs up to 18 lbs)
Large (27.5 inches - Dogs over 18 lbs)

*Collars are size adjustable
What Customers Say:
Seresto® Flea & Tick Collar is rated 5.0 out of 5 by 12.
Rated 5 out of 5 by from So simple and effective The Seresto Flea & Tick Collar is a year-round staple for each of my dogs. I love that I can put this collar on my dog and do not have to think about it for 8 months! I have never seen any fleas or ticks on my dogs who play out at the barn all day! The collar has no smell and is not greasy. Best of all, it is water-resistant and still effective after my dogs go swimming in the creek and after they get a bath!
Date published: 2021-11-09
Rated 5 out of 5 by from I just love these easy to use Seresto collars. I bought these collars for my dogs and my cat because I know they work. I've been using them for years and I no longer have a problem with fleas in my house or anywhere. No ticks either. They are great.
Date published: 2021-09-15
Rated 5 out of 5 by from The only flea and tick prevention I can use I have a super sensitive little dog topicals cause him to have seizures andn other neurological symptoms, and the chews....well I'm too scared to try bc if you have a super sensitive animal they too can cause the same symptoms of the topical (without the being able to wash off). A vet recommend this brand of coller to me after seeing first hand my delema. It does not effect my little guy in any way and truly keeps the ticks and fleas away! It's non greasy and is orderless (for the most part) so you don't get that residue smeared on your furniture and carpets like some of the other brands do. They are a little pricey but for me they are worth every penny! Keeps the pest away without harming my sensitive dude so he can enjoy his barn time with me.
Date published: 2020-04-24
Rated 5 out of 5 by from As described Bought this collar to replace a counterfeit Seresto purchased from another seller. This is an authentic Seresto collar. These work great for my dog - no fleas or ticks, and no greasy mess like other products.
Date published: 2019-06-18
Rated 5 out of 5 by from A must-have for living in Tick Town! We live in a very tick-heavy area and our dogs have to have year round tick protection. We had used another collar in the past but when it became unavailable switched to Seresto. I had concerns about the price since we have a lot of very active dogs who had been prone to breaking or losing the other brand. These collars have a unique locking mechanism that has resulted in not one lost! More importantly, they are far superior to repelling ticks than the other brand. And they truly do last 8 months. I'm so glad I switched to Seresto!
Date published: 2018-06-15
Rated 5 out of 5 by from WE are happy that Smart pak carries this brand. We have been using it with success on older dog. I do not like the topical application products.
Date published: 2018-05-08
Rated 5 out of 5 by from The only collar that really works! This will be my third season of using the Seresto collar on my pet. It is the most trouble free and effective way I have found of keeping ticks and fleas away from my pet and out of my house.
Date published: 2018-04-03
Rated 5 out of 5 by from Tick-free We live at ground zero for Lyme and others. Super results!
Date published: 2018-02-27
Rated 5 out of 5 by from Leagues above other methods I LOVE using this collar. No more greasy spots on by dogs neck and back from topicals. No more worrying about fleas and ticks. It does make my dog’s neck incredibly itchy so I like to take his collars off every evening and give him a good scratch. I haven’t noticed a rash or anything just a little extra itchy underneath. I refer this collar to everyone and I have not found it cheaper anywhere else. Most pet and farm stores are $60-$80 still. For 8 months of protection, it’s so cost affective against the competitors.
Date published: 2018-02-03
Rated 5 out of 5 by from Super Convenient I've loved the Seresto collars because it makes keeping fleas and ticks off of our dog so easy. It's nice to know that our dog has continuous protection without the hassle of putting liquid flea protection on.
Date published: 2018-01-19
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Q & A
Seresto® Flea and Tick Collar Review
Hear why SmartPaker Katrina uses this on her dogs and why she felt good about having it in her house with her two young kids.

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