Seresto Small Dog Vet-Recommended Flea & Tick Treatment & Prevention Collar for Dogs Under 18 lbs.|2 Pack
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Description
Description
As the original flea and tick collar, Seresto has delivered reliable, long-lasting** protection for years, earning its place as a leader* in flea and tick control.
Formulated with flumethrin and imidacloprid, the Seresto collar kills and repels fleas and ticks, and it kills chewing lice on dogs for a full 8 months. What's more, this tick and flea treatment for dogs is effective against fleas that may transmit tapeworm infections, as well as ticks that may transmit Lyme disease, anaplasmosis, Rocky Mountain spotted fever, and more.
How it works: The collar's polymer matrix uses extended-release technology to gradually distribute the active ingredients across your dog’s skin and coat for 8 months. That's season-to-season flea and tick prevention for dogs you can rely on. Best of all, this tick and flea dog collar works through contact***, so fleas and ticks don't have to bite your dog to die.
Recognized as the #1 vet-recommended^ flea and tick collar, Seresto delivers proven 8-month efficacy against fleas and ticks backed by years of real-world use.
Designed for dogs and puppies 7 weeks of age and older, the adjustable Seresto dog collar comes in two sizes: for dogs under 18 lbs. and dogs over 18 lbs. It’s also odorless, non-greasy, and water-resistant†.
*Elanco Animal Health. Data on file. REF-27768
**Based on label claim v. AOC, as of 3.9.2023
***Stanneck D Parasites & Vectors 2012 66; pg 2 p 5
^Elanco Animal Health. Data on File. REF-23987
†Seresto is water-resistant and remains effective following a shampoo treatment, swimming or after exposure to rain. 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.
Key Benefits
- Seresto is the #1 vet-recommended^ flea and tick collar
^Data on file. Elanco Animal Health. REF-23987 - Seresto kills and repels fleas on dogs 24 hours after application, becoming fully effective against ticks after 48 hours
- The collar is designed to slowly and consistently distribute the active ingredients (flumethrin and imidacloprid) over your dog's skin and coat for 8 continuous months
- Seresto Small Dog delivers reliable flea and tick control for dogs and puppies 7 weeks of age and older, and weighing under 18 lbs.
- The Seresto Dog Collar is odorless and non-greasy
Ingredients
Seresto Flea & Tick Collar for Dogs
| ACTIVE INGREDIENTS: | % By Weight |
|---|---|
| Flumethrin* | 4.5% |
| Imidacloprid | 10.0% |
| OTHER INGREDIENTS | 85.5% |
| 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.

- 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.
- As a guide, it should be possible to only insert 2 fingers comfortably between the collar and the neck.
- 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.
- 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
- It kills ticks right away.
- Some times makes them scratch & itch when first put on.
- If a flea or tick bite the collar kills the fess and ticks
- No cons
- Works great. No fleas. Only 2 ticks in 5 plus years.
- Chemicals in collar. May cause hair loss. Always have to wash hands after touching. Can
- Excellent protection from ticks
- Some dogs have been known to negatively react although we haven
- easy to use if they work in your area.
- did not work at all
- Small and unobtrusive
- Odor free
- No need to remove for bath time
- Not the least expensive - but well worth the cost.
- It does what it says it does
- none
- The reflectors fall off an dont stay attached to the collars very long.
- No bugs and easy to use. Best price at Entirely Pets.
- None that we've found
- No greasy mess, put it on put the sticker on my calendar for reorder and done.
- Nothing love this product.
- None
- Maybe its the climate here in Florida but it didn't eliminate every single flea.
- 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
- 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.
- Seresto collars last 8 month, and there is no messy monthly application.
- Best product for the money. Lasts eight months, don't have to worry about monthly applications, and is not messy.
- Easy install / no messy drops / last for months / AND WORKS / no trips to the vet
- ND
- No smell
- Easy to use
- Replace every 6 months
- No ill effects for my mini Aussie
- A little pricey. Works for about 6 mo., not 8 mo.



























