Bundle: Seresto Flea & Tick Collar for Dogs, over 18-lbs + Flea & Tick Collar for Dogs, up to 18-lbs

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About This Item

Details

Help protect your canine companions with this Seresto bundle! Every purchase comes with the Seresto Flea & Tick Collar for Dogs, over 18 lbs and the Flea & Tick Collar for Dogs, up to 18 lbs. With its innovative delivery system, the Seresto 8 Month Flea & Tick Collar offers a breakthrough in tick and flea control for your precious pup. 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 these easy-to-use, non-greasy, odorless collars 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!

Questions & Answers

3 Customer Questions

What is the length of the under 18 lb. collar?

Answer by Chewy • Feb 04, 2022
The Small Seresto collar measures 15 inches long and the Large Seresto collar measures 27.5 inches long.

Does this product come with one large and one small

Answer by Chewy • Dec 05, 2021
This bundle comes with 1 collar for dogs over 18lbs and 1 collar for dogs under 18lbs.

Can I use this on an week old puppy

Answer by Chewy • Mar 13, 2024
Do not use for puppies under 7 weeks of age.
Reviews
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4.4
Rated 4.4 out of 5 stars
296 Ratings
Terms & Conditions

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Active Ingredients

75% Positive

Comfort and Fit

78% Positive

Duration of Protection

78% Positive

Effectiveness

82% Positive

157 Customer Reviews

Rated 3 out of 5 stars
By Sally on Jan 17, 2026

Mixed Results Mixed Satisfaction

I have witnessed excellent results with some breeds and poor with others. Generally excellent flea protection, but engorged ticks found repeatedly on Tibetan Terrier’s

I have witnessed excellent results with some breeds and poor with others. Generally excellent flea protection, but engorged ticks found repeatedly on Tibetan Terrier’s head. Excellent control on Havanese and Pumi. In my experience the collar cannot be loosened nor removed without cutting. This is false advertising. Even an attempt to compress the loop with pliers is impossible. Therefore, as my Pumi puppy grew the collar was far too tight and had to be cut off. $$$

Rated 4 out of 5 stars
By Crystal on Oct 16, 2025

FLEA & Tick

This has been a horrible year for fleas with the excessive heat. It took about 4 days after wearing the collar to stop the constant scratching. There are still some

This has been a horrible year for fleas with the excessive heat. It took about 4 days after wearing the collar to stop the constant scratching. There are still some fleas but not nearly as bad. Both dogs hair has grown back where they scratched themselves raw.

Rated 5 out of 5 stars
By Debbie on Nov 20, 2025

They are true to their advertising.

We’ve used these for years and they work! they are pricey and you have to watch for knockoffs. I trust Chewy to deliver the real ones and have not been disappoi

We’ve used these for years and they work! they are pricey and you have to watch for knockoffs. I trust Chewy to deliver the real ones and have not been disappointed.

Rated 3 out of 5 stars
By Yaulanda on Oct 25, 2025

Not working anymore

This is not my first time purchasing Seresto collars. They have always worked great but this time they are not working on my dogs not sure if anything has changed

This is not my first time purchasing Seresto collars. They have always worked great but this time they are not working on my dogs not sure if anything has changed but if it has, please go back to the way they were.

Rated 3 out of 5 stars
By Tiffany on Aug 14, 2025

Did Seresto change their formula?

We've been using Seresto flea collars for more than 15 years with all our dogs. The last batch of collars I received, just don't seem to be keeping the fleas off

We've been using Seresto flea collars for more than 15 years with all our dogs. The last batch of collars I received, just don't seem to be keeping the fleas off my dogs. We've never had any issues, but this time around- both my dogs have fleas. Not sure if Seresto changed something in their collars? Perhaps the fleas are getting immune to the collars? My dogs spend most their time inside our house, with daily walks/adventures outdoors, but this round of collars, just aren't living up to the hype we've come to know & trust.

Rated 5 out of 5 stars
By Barbara on Jan 8, 2026

Convince

Have used for several years has worked well.

Have used for several years has worked well.

Rated 1 out of 5 stars
By Victoria on Jul 28, 2025

Not working

These collars for the price are worthless. I don't know what's different but my dogs still have fleas . I put 2 on my German shepherd and she still is covered

These collars for the price are worthless. I don't know what's different but my dogs still have fleas . I put 2 on my German shepherd and she still is covered and scratching.

Rated 5 out of 5 stars
By Angelenia on Aug 28, 2025

Always my go to.

I use seresto on my dog, and my 5 cats. It’s never let me down. It works well past the 8 month mark too!

I use seresto on my dog, and my 5 cats. It’s never let me down. It works well past the 8 month mark too!

Rated 5 out of 5 stars
By Richard on Dec 5, 2025

The staff are great!

Super helpful, friendly and knowledgeable.

Super helpful, friendly and knowledgeable.

Rated 2 out of 5 stars
By Karen on Sep 6, 2025

These colors do not work like they used to.

I have ordered 2 times this year and they are still not working like they used to.

I have ordered 2 times this year and they are still not working like they used to.