Seresto vs K9 Advantix II

Being a responsible owner is not enough with only providing the pet with food, clean water, and shelter to sleep but we also have to pay attention to their health and overall wellbeing. One issue when having a pet like dogs is dealing with fleas and ticks especially during summer where the insects seem to be everywhere. But, worry not because Seresto vs K9 Advantix II are here to save the day and keep those parasites away for your dogs but, see which suit them better below before shopping.

In this article, we are going to give you information about:

  • How Dogs get Infested with Fleas and Ticks
  • What are Seresto and K9 Advantix II
  • What Seresto and K9 Advantix II Look Like
  • What Seresto and K9 Advantix II are made of
  • How Seresto and K9 Advantix II Work
  • Seresto vs K9 Advantix II

Fleas and Ticks in Dogs

Having a pet like dogs at home is sure beneficial because not only they are a very loyal friend and always there for us which is great to both help soothe the mind due to their cute behaviors and since dogs require exercise, we can also benefit from the active life for we have to take them outside from to time or even everyday. While it all sounds very fun, in fact being a responsible owner is more and we have to pay attention to their health as well.

Dog is a very social animal and as opposed to cats that spend most of their lives sleeping, this popular pet loves to play with their friends both human and animals and often seek adventure on their own. Since their nose and ears are very sensitive, they can locate a source of scent and sound which is why we often take them while hunting as well. One of the problems of active dogs is the more time dogs spend outside, the higher the chance they will be infested by insects.

What we mean by insects here is actually the common issue of fleas, ticks, and lice which are all prominently living out there in nature. These harmful insects are not only uncomfortable to think of but also more uncomfortable for our dogs to live with. The insects are living naturally in the environment and spreading more often when in summer so they may get infested while playing around in your backyard or while playing with other animals that are already infested.

If this is the only cause, we can keep them at home and provide the toys or activities to play around so they can spend the energy without being exposed to the insects outside the house. However, since these insects are very small and often goes unnoticed, it doesn’t mean that our house are free from them and while you are reading this article, there are probably some of these insects already living in your patio and threatening your pets whether it is dogs or even cats.

Since this can be a serious problem for the owner, we should protect our dogs from the insects and to do so, we can purchase some flea solution in pet shops or grocery stores. There are several various solutions available and we should pick the one that fits our preference the most because there is no one “best” for everyone. For convenience and long lasting protection, collars will do very well but if you need an immediate action, topical solution usual works quite faster.

About Seresto

The decision is all up to the owner and the level of problems your dog is currently at because not all of us are going to have the same issue. But, thanks for being the many pet owners’ problem, the solution for fleas, ticks, and lice are prominently available almost everywhere and since dogs is still one of the most popular pets, their specialized solution is also available from many insecticide manufacturers out there. If long protection and convenience is at the top consideration, Seresto is one of the best options to go.

This brand is probably the most popular flea collars for dogs in the market with the direct competitor Scalibor because not only this collar is easy to apply in your dog’s neck, it is also effective to kill and eliminate those harmful insects that have been infesting your dogs. If you are interested in great collars, see our Seresto Vs Scalibor in previous article because in comparison these two are equally good and effective. As for this Bayer product, there are two versions; one for dogs and another for cats.

This collar is very similar to any flea collars out there and should be placed on the dog’s neck but in terms of fast acting, the collars will need some time before spreading above their skin. As for the dogs collar, it is effective up to 8 months before we should change them again for long protection.

Seresto Package

Unlike some similar dog collars in the market, your Seresto will comes in a white tin with the product description on top. This tin looks like the one we used to have for containing fruit drops but it contains one collar which looks like a plastic collar at first. It has a light grey in color and has a strap system to fit the length so we can adjust them properly. Besides also offering the cat version, this dog collars have two sizes available; one for smaller dogs below 18 lbs. and one for bigger dogs. 

Seresto Ingredients

To work effectively, all solutions must be made with active ingredients and most of them are pesticides to kill the fleas and similarly annoying insects. For Seresto, this collar is used as a shell to carry two active ingredients imidacloprid at 10% and flumethrin at 4.5%. The first chemical is like a nicotine we also found in tobacco and the ingredient will work when ingested by the sucking insects. The second active ingredients is repelling and kill ticks in all life stages by shutting their central nervous system.

Using Seresto

While topical solution is easier to understand, flea collars are rather more complicated because they are not directly applied to the skin. Seresto collar is made from a few layers and the center is containing the concentration of active ingredients. The collar is very sensitive to movement and when your dog’s skin or fur is in contact with the outer layer, it will release the ingredients to the surface but is less concentrated. Along the time, the ingredients then travel throughout the body to do the job.

About K9 Advantix II

While flea collars are very convenient and easy to use as well as effective for longer, it is also true that we need more time before the result is seen and this is why not all pet owners both dog and cats prefer using one. If the fleas, ticks, or lice problems is quite severe or you need something that can deal with the problem as quickly as possible, a topical solution such as K9 Advantix II is a very ideal option.

Similar to Seresto, this solution is also made by Bayer and also a competitor of another popular topical product Frontline. What’s unique, not only it will kill fleas and ticks, this one is also dealing with mosquitoes in case your environment have many of them in which most states are dealing with more starting from February to March.

K9 Advantix II Package

Since it is a topical solution, K9 Advantix II is packed in a small box and this package contains 6 small tube filled with a clear, gel like solution. Some solutions doesn’t have scent in it but, this one has a fresh fragrance which some people experienced up to a month. One small tube is for one month use so a pack should last for half a year for one dog. It is meant for at least 7 weeks puppy and should never be used on cats.

K9 Advantix II Ingredients

On the active ingredients, K9 Advantix II is made with 44% Permethrin, 8.8% imidacloprid, and 0.44% pyriproxyfen. The first one is an insecticide and very popularly used as a meant to treat scabies and lice, also often comes in cream solution. The second is still an insecticide and not harmful in moderate skin exposure but highly toxic for insects since it can interfere with the transmission of stimuli on the nervous system. The last is growth regulator and stop young insects from maturing to adults as well as disturb egg-laying and hatching.

Using K9 Advantix II 

As a topical solution, all of those mentioned ingredients are working hand in hand to deal with the problem and kill or reduce the amount of flea and ticks infested in your dogs. Its gel-like solution is used one tube at a time and we have to apply them directly to the dog’s skin. Make them stand properly and spread the furs behind the back from neck to near their tail. Apply in an amount along this line and keep them from other dogs for 24 hours and water for 4 days.


Now, let’s compare Seresto with K9 Advantix II. As you may already know, both of them are very similar to each other, made by the same company, but are also different. Seresto is nice for protection against fleas since it needs some time before spreading to all over the skin while due to its nature of being topical solution, K9 Advantix II is working faster yet less convenient and we have to keep the dogs from other dogs and water.  

Seresto vs K9 Advantix II

- Seresto large dog flea collar provides 8 months of continuous flea and tick prevention
- Bayer Seresto collar works through contact, killing and repelling fleas and ticks, so they don?t have to bite your dog to die
- Active ingredients imidacloprid and flumethrin are slowly and continuously released in low concentrations, spreading from head to toes, even the tail, over your dog?s coat and skin
- Seresto flea and tick dog collar also aids in the treatment and control of sarcoptic mange and kills lice
- New packaging, same formula: Contains six one month application of Bayer K9 Advantix II topical flea, tick and mosquito prevention for large dogs 21 to 55 pounds
- K9 Advantix II kills through contact, so fleas, ticks and mosquitoes don’t have to bite your dog to die
- Veterinarian recommended
- Repels and kills fleas, ticks and mosquitoes


All in all, the decision is all yours to make because not all of us are going to have the same preference and it is best to get the one that fits your dogs the most. If the problem needs a quick handling, we do recommend K9 Advantix II but for a long lasting protection and prevention, Seresto is more convenient.