Updated August 15, 2018 by Brett Dvoretz

The 9 Best Dog Flea Treatments

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This wiki has been updated 19 times since it was first published in December of 2015. Keep your dog safe and comfortable all year round with one of these flea treatments, some of which will even rid your pet of ticks and mosquitoes, as well. They come in a variety of application methods, such as pills, sprays, and spot treatments, as well as chemical and all-natural formulations to suit every dog owner's needs. When users buy our independently chosen editorial choices, we may earn commissions to help fund the Wiki. Skip to the best dog flea treatment on Amazon.

9. Sentry Capguard

8. Promika Adventure Plus

7. Petarmor Pro Advanced

6. Vet's Best Pet and Home Spray

5. PetArmor FastCaps

4. Frontline Plus

3. Bayer Advantage II

2. Novartis Capstar

1. Bayer K9 Advantix II

Why Do Dogs Get Fleas?

The anatomy of the common canine flea is such that the legs are nearly as long as the body; which is relatively flat and aerodynamic.

The small, brown insects found on the skin of many canines in warmer months are only one species of the Siphonaptera order of insects. Fleas are preferential creatures; so much so that different species feed off of different animals. For instance, Ctenocephalides felis is the flea most attracted to both domestic and wild felines, whereas the Pulex irritans species prefer to feed off of humans. The canine flea is properly known as Ctenocephalides canis. In all, there are over two thousand known species of flea.

While all fleas have their preferred host; they will happily jump from one species to another. It is just as common for a canine flea to bite a human or a feline. The anatomy of the common canine flea is such that the legs are nearly as long as the body; which is relatively flat and aerodynamic. Fleas propel themselves from host to host using these long legs; constantly seeking their perfect habitat.

Fleas prefer temperatures of 65-85 degrees Fahrenheit and humidity levels of close to 80 percent. For the Ctenocephalides canis species; the perfect habitat is the warm, humid area on a dog's skin and fur. Canine fleas are most likely to congregate in the dog's armpits, under their ears, and just above their tail.

Infestations are not solely due to poor canine hygiene, as is commonly thought. Unless the dog is washed using only medicinal shampoos and flea-repellent conditioners, the average adult flea pays little attention to the personal hygiene of their host. As one of many common canine ectoparasites, they only survive by feeding on the blood of their hosts. Because of this, the only consideration in a flea's mind is where the next meal comes from. Flea infestations simply occur through contact with other animals or contact with fleas in the animal's environment.

Do Fleas Pose A Real Threat?

When pruritus first appears in dogs, it may be difficult to ascertain a definite cause. Dietary factors should be considered, as well as the possibility of allergic skin disorders which have little to do with ectoparasites. When the symptoms do appear, there are very typical signs to look out for. One benefit of pruritis caused by Ctenocephalides canis is that the fleas themselves may be observed on the dogs skin. Another definite sign of a flea infestation is known as flea dirt; the fecal matter of fleas which resembles black pepper granules scattered across the epidermis of the animal.

When pruritus first appears in dogs, it may be difficult to ascertain a definite cause.

Aside from simply annoying their domestic hosts, fleas may actually pose a threat to the well-being of the animals they bite. The flea’s bite is most commonly associated with the pruritis experienced by both humans and animals; severe itching of the skin disproportionate to the size of the small wound. For sensitive dogs, the experience can be quite severe.

Some domestic pets are hypersensitive to the flea's saliva. The condition is known as flea allergy dermatitis; and causes canines to itch over a broad area of the body due to one single flea bite. Over time, this can lead to hair-loss, inflammation and even secondary skin infections. Fleas may also transmit tapeworms and diseases to their canine hosts.

The easiest way to ameliorate symptoms of a flea infestation is through the use of various dog flea treatment options. As science has explored novel treatment methods and identified ways to target multiple species of fleas; dog flea treatment options provide safe and effective ways to reduce flea populations both on the animal and in their surrounding environment.

Why Are Regular Dog Flea Treatments Necessary?

In large part, dog flea treatments only work for a predetermined amount of time; and this has much to do with the strength and safety of medications and the life cycle of the fleas themselves. The life cycle of a flea varies by species; and plays an integral role in treatment methods.

These eggs, up to 2000 of them, may start out on the host, but they readily fall about the environment as the host moves around.

There are four developmental stages in a flea's life cycle. An adult flea lives its life entirely on a host; feeding off of the host's blood and laying eggs on its skin. These eggs, up to 2000 of them, may start out on the host, but they readily fall about the environment as the host moves around. The process begins just two days after inhabiting the host. An egg can take up to ten days to hatch, giving plenty of time for many effective dog flea treatment medications to lose potency and need reapplication.

The hatched larvae are the only free living versions of fleas; as they feed off of organic material and flea dirt found in their environment. At the end of the larval stage, a flea will wrap itself in a cocoon for its pupal stage; lasting for a month on average. When it emerges it is an adult flea, ready to look for a host to live out the rest of its days upon. However if left undisturbed, flea pupae can survive for five or six months before emerging as an adult. For this reason alone, reapplication of dog flea treatments is necessary to avoid re-infestation.

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Brett Dvoretz
Last updated on August 15, 2018 by Brett Dvoretz

A wandering writer who spends as much time on the road as in front of a laptop screen, Brett can either be found hacking away furiously at the keyboard or, perhaps, enjoying a whiskey and coke on some exotic beach, sometimes both simultaneously, usually with a four-legged companion by his side. He has been a professional chef, a dog trainer, and a travel correspondent for a well-known Southeast Asian guidebook. He also holds a business degree and has spent more time than he cares to admit in boring office jobs. He has an odd obsession for playing with the latest gadgets and working on motorcycles and old Jeeps. His expertise, honed over years of experience, is in the areas of computers, electronics, travel gear, pet products, and kitchen, office and automotive equipment.


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