Last Updated: January 03, 2021

Best Flea Powder

Best Flea Powder

We’ve completed our review of many available flea powders on the market today. The two most essential criteria in choosing the best flea powder are 1) effectiveness and 2) safety for you, your family, your cat or dog, and other pets. Our recommendation is to apply Fleabusters RX for Fleas Plus Powder (Boric Acid). Please note: We recommend using flea powder in your home only during a flea infestation, not as flea control or to be used on your cat or dog.

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Best Overall
Fleabusters RX for Fleas Plus Powder
Fleabusters RX for Fleas Plus Powder Best Overall
$34
Review manufacturer amazon
on amazon
9/10
  • What we Like
  • Kills fleas, eggs, and larvae
  • Dehydrates flea larvae
  • Approved as safe for pets and humans
  • Large canister (3lbs) provides up to 900 square feet of coverage
  • What we Dislike
  • Can be hazardous to both humans and pets if used incorrectly
  • Do not apply directly onto your cat
Product Details
Speed Kills existing fleas
eggs
and larvae
Efficacy Up to 12 months
Safety

ntoxic if used correctly
Availability Sold without a prescription
Ingredients Orthoboric Acid (aka Boric Acid)
Our Review

According to Fleabusters, the boric acid crystals are statically charged, allowing them to stick to carpet and upholstery fibers and preventing them from being removed during vacuuming. Furthermore, the crystals act to dehydrate flea larvae, thus providing flea prevention for up to 12 months. Please don’t confuse Boric Acid with Borax (sodium tetraborate). According to the ASPCA, “Borax is a compound used to make glass and is found in many cleaning products. If ingested, borax can cause stomach upset and irritation in pets. In high doses, it can even cause injury to the kidneys.”

Best Budget
Tropiclean Natural Flea & Tick Carpet Powder
Tropiclean Natural Flea & Tick Carpet Powder Best Budget
$16
Review manufacturer amazon
on amazon
6/10
  • What we Like
  • Kills and repels fleas and ticks on contact
  • Approved as safe for pets and humans by EPA
  • Canister provides up to 550 square feet of coverage
  • What we Dislike
  • May cause mild eye irritation
  • Do not apply directly onto your cat
Product Details
Speed Kills and repels fleas and ticks on contact
Efficacy Up to 1 month
Safety Safe for humans and pets
Availability Sold without a prescription
Ingredients Sodium Bicarbonate (Baking soda)
Our Review

TropiClean recommends using this product for carpet, upholstery, pet bedding, and application on dogs. It does not recommend applying directly to your cats. However, this ingredient, alone, is not an effective treatment for fleas, especially during a flea infestation. But, please do not combine this with either table salt or boric acid. Please, instead, choose to apply this according to the directions, vacuum frequently and treat all your pets for fleas with flea drops or oral flea medications.

Richard's Organics Flea Premise Treatment
Richard's Organics Flea Premise Treatment
$-52
Review manufacturer amazon
on amazon
5/10
  • What we Like
  • Kills fleas, eggs, and larvae
  • Dehydrates flea larvae
  • Approved as safe for pets and humans
  • No color or fragrance additives
  • What we Dislike
  • Can be hazardous to both humans and pets if used incorrectly
  • Do not apply directly onto your cat
  • Canister available only in 20 oz size
Product Details
Speed Kills existing fleas
eggs
and larvae
Efficacy Up to 12 months
Safety

ntoxic if used correctly
Availability Sold without a prescription
Ingredients Orthoboric Acid (aka Boric Acid)
Our Review

Unlike Fleabusters’ product, this flea powder by Synergy Labs does not claim to “statically charge” the particles, which would allow them to stick to carpets and other surfaces longer, and to increase safety for you and your family. This product also only comes in a 20 oz container, limiting the amount of area in your home that can be covered. Please don’t confuse Boric Acid with Borax (sodium tetraborate). According to the ASPCA, “Borax is a compound used to make glass and is found in many cleaning products. If ingested, borax can cause stomach upset and irritation in pets. In high doses, it can even cause injury to the kidneys.”

Flea Away Diatomaceous Earth for Dogs & Cats
Flea Away Diatomaceous Earth for Dogs & Cats
$66
Review manufacturer chewy
on chewy
1/10
  • What we Like
  • Claims to kill Ants, Bedbugs, Silverfish, Flour Beetles, Fleas, Cockroaches, Slugs, Earwigs, Centipedes, Millipedes, Sowbugs, Pillbugs, Carpet Beetles, Spiders, Crickets, Colorado Potato Beetles and Caterpillars both indoors and outdoors
  • Organic food grade DE
  • What we Dislike
  • Hazardous to humans and animals if inhaled
  • May be hazardous to animals if ingested
  • May cause skin irritation on humans
  • Only kills adult fleas. Will not kill eggs, larvae, or pupae
Product Details
Speed Kills fleas and other insects
Efficacy Up to 1 week on cats
Safety Hazardous -- see precautions
Availability Sold without a prescription
Ingredients Diatomaceous Earth (DE)
Our Review

The label indicates that you should apply directly to cats (dogs), rugs, hardwood floors, bedding, and outdoor areas. Efficacy is up to 1 week on pets and 2 – 3 weeks for outdoor spaces. Flooring re-application is recommended once per week for two weeks, then monthly. Upholstery efficacy is up to 1 month. Vacuuming of flooring and upholstery is required 48 hours after application. During application and vacuuming, it is essential to wear a mask and gloves and keep all pets away from the area due to inhalation dangers. According to PetMD, most veterinarians do not recommend using DE on your pets or for flea control within the home, given the inhalation risk. Also, ingesting DE could be harmful to your cats, given their propensity to self-groom. If your pet consumes too much DE, it can result in severe gastrointestinal upset. If you choose to use this product, we recommend consulting with your veterinarian first and carefully following the directions.

NaturPet Fleeze Pet Topical Powder
NaturPet Fleeze Pet Topical Powder
$19
Review manufacturer chewy
on chewy
1/10
  • What we Like
  • Kills ticks and fleas
  • Neem prevents eggs and larvae from developing
  • Neem may enhance your cat’s coat and soothe skin
  • What we Dislike
  • Hazardous to humans and animals if inhaled
  • Hazardous to cats if ingested
  • May cause skin irritation on humans
Product Details
Speed Kills fleas and other insects
Efficacy 2-3 days on cats
Safety Hazardous -- see precautions
Availability Sold without a prescription
Ingredients Diatomaceous Earth (DE) and Neem
Our Review

The product label indicates applying the dust to your cat, your cat’s bedding, and within its litterbox, then brushing your cat 2-3 times per week, and reapplying the dust to your cat at that time. Bedding should receive an application twice weekly, along with vacuuming. During applications and vacuuming, it is essential to wear a mask and gloves and keep all pets away from the area due to inhalation dangers. Most veterinarians do not recommend using DE on your pets or for flea control within the home, given the inhalation risk. Also, ingesting DE could be harmful to your cats, given their propensity to self-groom. Severe gastrointestinal upset may result if your cat digests this product while grooming. DE only kills fleas that have hatched, so if there are eggs present, it will not successfully wipe out an infestation.

The NPIC notes that “In other countries, neem oil has been used on cats for flea control. Some adverse reactions have been reported. Symptoms include feeling sluggish, excessive salivation, impaired movement, trembling, twitching, and convulsions. Some of the cats died. However, most of them recovered within 1 to 5 days.” If you choose to use this product, we recommend consulting with your veterinarian first and carefully following the directions.

Hartz UltraGuard Flea & Tick Powder for Cats
Hartz UltraGuard Flea & Tick Powder for Cats
$17
Review manufacturer amazon
on amazon
1/10
  • What we Like
  • Kills fleas, ticks, and lice
  • Water-resistant
  • What we Dislike
  • Poses significant health risks - DO NOT BUY
Product Details
Speed Kills existing fleas on contact
Efficacy Up to 7 days
Safety Safe for kittens and cats 12 weeks of age and older
Availability Sold without a prescription
Ingredients Tetrachlorvinphos
Our Review

This product contains Tetrachlorvinphos (TCVP), a member of the organophosphate family of parasiticides. It was used beginning in 1966 as a crop treatment and canceled as such in 1987.
It’s a dangerous parasiticide. According to our research, humans are at risk of toxic exposure from dusting products containing TCVP. Toddlers who frequently touch animals and then put their fingers in their mouths are especially at risk. The digestion of TCVP could negatively impact a child’s neurological systems. Toxicity in cats can result in diarrhea, vomiting, difficulty breathing, neurological symptoms, and even rapid death. Even the EPA has scheduled the removal of this product from the market in March of 2021. We cannot say with certainty that harm will come to you, your family, and your cats by using flea dust containing TCVP. However, given all the data we’ve gathered, we recommend a DO NOT BUY for this product.

Hartz UltraGuard Plus Flea & Tick Pet Carpet Powder, Adams Flea & Tick Carpet Powder, PetArmor® Home Flea & Tick Carpet Powder, SENTRY® HOME Flea & Tick Carpet Powder, Bio Spot Active Care Flea & Tick Carpet & Upholstery Powder
Hartz UltraGuard Plus Flea & Tick Pet Carpet Powder, Adams Flea & Tick Carpet Powder, PetArmor® Home Flea & Tick Carpet Powder, SENTRY® HOME Flea & Tick Carpet Powder, Bio Spot Active Care Flea & Tick Carpet & Upholstery Powder
$
Review manufacturer
on
1/10
  • What we Like
  • Most products begin killing fleas within 24 hours
  • Kills flea eggs and larvae for up to 1 year
  • Some products kill lice or ticks
  • Scented for carpet deodorization
  • What we Dislike
  • Hazardous to humans and animals - DO NOT BUY
Product Details
Speed Kills fleas
eggs
larvae
Efficacy Between 30 days and 12 months
Safety Toxic to cats
Availability Sold without a prescription
Ingredients All products contain Pyrethrins
Our Review

Instructions are to administer on carpet and upholstery. Do NOT apply directly to pets. In reading the warnings provided by one of these manufacturers, we found this: “Do not apply this product in a way that will contact adults, children, or pets, either directly or through drift.” Drugs.com provides a comprehensive list of precautionary statements for Pyrethrins. When using these products, you must vacate your residence for a minimum of 24 hours following application. Even after vacuuming, the residual powder is still of grave concern. An academic study in 2016 noted that pyrethrins are “extremely toxic to cats.” Because this product poses significant health risks to you, your family, and your cats, we do not recommend buying these products.

Natural Care Flea & Tick Carpet Powder
Natural Care Flea & Tick Carpet Powder
$0
Review manufacturer amazon
on amazon
1/10
  • What we Like
  • Kills fleas, eggs, larvae, ticks, and ants contact
  • Canister provides up to 800 square feet of coverage
  • What we Dislike
  • Toxic to dogs, cats, and horses - DO NOT BUY
  • Only works during application and up to 24 hours
  • May cause moderate eye irritation
  • Wear eye, mouth, and skin protection while using
  • Do not apply directly onto your cat
  • May stain carpets and upholstery
  • Strong scent
Product Details
Speed Kills and repels fleas and ticks on contact
Efficacy Upon application up to 24 hours
Safety Toxic to pets
Availability Sold without a prescription
Ingredients Geraniol and Cornmint Oil
Our Review

Directions are to rugs, upholstery, and your cat’s bedding, and then vacuum 1 to 24 hours later, depending on flea infestation level. The benefits of this dust last only until removed. The manufacturer says to reapply dust as often as is needed. Warning! According to the ASPCA, Geraniol, one of the active ingredients in this product, is toxic to dogs, cats, and horses. And according to Texas A&M University’s Veterinary Medicine and Biomedical Sciences department, Cornmint Oil, the other active ingredient in this product, is toxic to cats. Therefore, we have to recommend that you DO NOT BUY this product.

Only Natural Pet EasyDefense All-in-One Flea & Tick Dog, Cat & Home Treatment
Only Natural Pet EasyDefense All-in-One Flea & Tick Dog, Cat & Home Treatment
$0
Review manufacturer chewy
on chewy
1/10
  • What we Like
  • “Removes” fleas and ticks at all life stages
  • 100% human-grade ingredients
  • Formulated by Holistic Veterinarians
  • What we Dislike
  • Toxic to pets - DO NOT BUY
Product Details
Speed Removes fleas and ticks
Efficacy Information not provided by the manufacturer
Safety Toxic to pets - DO NOT BUY
Availability Sold without a prescription
Ingredients Geraniol and Peppermint Oil
Our Review

For pets, rugs, upholstery, and outdoors. The manufacturer claims this product “removes” fleas and ticks at all life stages. However, the information provided does not state whether the product kills, repels, or both. Most importantly, both geraniol and peppermint oil are toxic to pets, according to Texas A&M University’s Veterinary Medicine and Biomedical Sciences department. Therefore we recommend a DO NOT BUY for this product.

NaturVet Herbal Flea Cat & Dog Powder
NaturVet Herbal Flea Cat & Dog Powder
$12
Review manufacturer amazon
on amazon
1/10
  • What we Like
  • Repels fleas
  • What we Dislike
  • Toxic to pets - DO NOT BUY
  • Hazardous to humans
Product Details
Speed Repels fleas
Efficacy Information not provided by the manufacturer
Safety Toxic to pets and hazardous to humans- DO NOT BUY
Availability Sold without a prescription
Ingredients Thyme Oil
Lemongrass Oil
Rosemary Oil
Our Review

Label instructions say to apply this dust directly onto pets and pet bedding. However, According to Texas A&M University’s Veterinary Medicine and Biomedical Sciences, all three active ingredients are toxic to pets. Although the ASPCA’s Poisonous Plants directory disagrees with Texas A&M as to thyme and rosemary’s toxicity, they agree with Texas A&M on the toxicity of lemongrass. Therefore, we recommend a DO NOT BUY for this product.

Best for Outdoors
First Saturday Lime Monthly Pet Insect Repellent
First Saturday Lime Monthly Pet Insect Repellent Best for Outdoors
$0
Review manufacturer amazon
on amazon
4/10
  • What we Like
  • Repels ticks, fleas, ants, gnats, garden pests, biting bugs, and other insects
  • Perimeter, outdoor protection
  • No odor
  • All-natural ingredients
  • Non-silica based
  • What we Dislike
  • Citrus is toxic to pets
Product Details
Speed Repels fleas and other insects
Efficacy Up to 4 weeks
Safety Used outdoors - See precautions
Availability Sold without a prescription
Ingredients Citric Acid
Our Review

Given that this product is to be used outdoors and is “natural,” we’ve considered it a possible additive to flea treatment and control. Do not use this product indoors!

This product is meant to be a substitute for silica-based powder such as diatomaceous earth.  The principal active ingredient is citric acid, which is poisonous to pets. The ingredients in this lime are treated to be insoluble, so are not going to be as toxic. However, it’s still not a product to use indoors or directly on your cat. It can cut down on insects, including fleas and ticks, in the exterior areas of your home, yard, and outbuildings.  We advise keeping your pets and other animals away from areas where applied as a barrier should you choose to use it at your home.

Best Products Best Flea Powder
Product Name Best for Rate
Fleabusters RX for Fleas Plus Powder Best Overall 9
Tropiclean Natural Flea & Tick Carpet Powder Best Budget 6
First Saturday Lime Monthly Pet Insect Repellent Best for Outdoors 4

How to Choose:

In the past, many people used flea powders on their cats. Due to the invention of other methods such as flea drops and oral flea medications, the popularity and sales of flea powders have dropped. One reason for the decline in sales is safety, which we discuss below.

We would like to note that flea powders are only appropriate for use on flooring and furniture/upholstery and only in the event of a flea infestation. These products are all messy and potentially hazardous at various levels. If you choose to use powders, you should wear protective gear, remove pets from the area until you can clean and vacuum surfaces, and you must cover fish tanks, food, and eating areas in your home. It’s not a simple process of spreading some powder and letting it work. Even with our top two products, you must use a broom to drive the substances into carpets, crevices of woodwork, and upholstery. Vacuuming is necessary after some time. Change your vacuum filter frequently by emptying the filter or throwing away the bag outdoors.

In this case, an ounce of prevention outweighs the pound of cure. Keeping your cats (and other pets) on a regular regimen of proactive flea prevention will save you time, bites, mess, and potential health issues.

As with all flea products, we advise a consultation with your veterinarian before using flea products.


Speed:

Most of the products we reviewed state that fleas will die upon contact. Flea eggs, larvae, and pupae are killed or prevented from hatching by some products. And some products also kill ticks. Other products, such as those made from essential oils, repel insects. Some of the powders, such as diatomaceous earth, only kill fleas that are hatched, and will not address the problem of the eggs laid by female fleas.


Efficacy:

Efficacy is one of the essential factors to consider when purchasing a flea powder. Chemical parasiticide products containing Pyrethrins are chemicals known for killing fleas, eggs, larvae, and ticks for 30 days (and some killing eggs, larvae, and pupae for up to 12 months). The Hartz product containing Tetrachlorvinphos will only kill adult fleas for seven days.

Much safer products such as FleaBusters RX for Fleas Plus Powder kills existing fleas, eggs, and larvae for up to 12 months.

Diatomaceous Earth (DE) is a natural ingredient derived from a naturally occurring rock containing diatoms’ fossilized remains (a type of shell). Naturalists have widely promoted it as both a surface area treatment (flea control, mite control on chickens) and a dietary supplement. DE kills insects, including fleas, by cutting the insects with the microscopic edges of the powder. The efficacy of this ingredient is only a few days on a cat to twice weekly on carpets.

Products containing essential oils decline to offer a time over which the products are effective at repelling fleas. Most say that consumers may re-apply as necessary.


Safety & Ingredients:

In our reviews, you’ll note that we’ve recommended a DO NOT BUY on most flea powder products available due to safety concerns having to do with parasiticide ingredients. Those products are listed below. The safest and most effective product we found was FleaBusters RX for Fleas Plus Powder (using Boric Acid). These products provide a dry environment that kills fleas, ticks, flea eggs, and pupae.

Boric Acid is an ingredient with fairly high safety ratings and efficacy. We recommend FleaBusters RX for Fleas Plus Powder versus generic boric acid and Richard’s Organics Flea Premise Treatment because the crystals in FleaBusters’ powder are statically charged, allowing them to stick in place and reducing the exposure to the chemical. According to the NPIC, “Boric acid is low in toxicity if eaten or if it contacts skin.” Boric acid has met EPA yellow triangle (Δ) category, meaning it is a “The chemical has met Safer Choice Criteria for its functional ingredient-class but has some hazard profile issues.” The NPIC states that powders spread in homes can present a hazard to humans, and the Public Chemistry Database: “May damage fertility or the unborn child.” Therefore, we recommend taking precautions to lower the risk of exposure, especially for pregnant women. Anyone handling the product should wear eye, mouth, and skin protection. It is crucial that you thoroughly follow the directions for this product to maximize effectiveness and minimize exposure.

Sodium Bicarbonate (baking soda) which is the primary active ingredient in the TropiClean product is somewhat effective in killing fleas. It is considered safe. According to the Public Chemistry Database, Sodium Bicarbonate (baking soda) has been deemed by the EPA as a green circle (Ο) (“EPA Safer Choice”) substance, meaning, “The chemical has been verified to be of low concern based on experimental and modeled data.” This organization says that baking soda may cause mild irritation to the eyes and recommends wearing safety glasses, gloves, and a mask when dust particles are present, typically during the product’s application. According to PetMD, “Baking soda contains no harmful chemicals and poses no danger to children or pets unless it is ingested in large amounts. Always consult your veterinarian before using baking soda on your pet and spot test before using baking soda to clean carpets and furniture.” For your reference, the Pet Poison Control has a chart illustrating the toxic amount according to your pet’s size.

Some holistic websites recommend combining baking soda with table salt. We do not recommend using table salt as 1) the amount of salt needed to effectively kill fleas is unreasonable, and 2) salt poses a health risk to pets who may consume salt, causing severe health issues and may irritate pets’ paws.

Additionally, do not confuse Boric Acid with Borax (sodium tetraborate). According to the ASPCA, “Borax is a compound used to make glass and is found in many cleaning products. If ingested, borax can cause stomach upset and irritation in pets. In high doses, it can even cause injury to the kidneys.”

Diatomaceous Earth is a natural product. However, don’t let the word “natural” fool you. During the application and vacuuming of the DE, it is essential to wear a mask and gloves and keep all pets away from the treatment area due to inhalation dangers. According to PetMD, most veterinarians do not recommend using DE on your pets or for flea control within the home, given the inhalation risk. Also, severe gastrointestinal upset is possible in cats given their propensity to self-groom. The sharpness of the microscopic fossilized particles can, indeed, cause respiratory and gastrointestinal issues. You may want to think of it as spreading, breathing, and digesting tiny bits of glass. If you choose to use this product, we recommend consulting with your veterinarian first and carefully following the directions. And, remember, from an efficacy point of view, DE only lasts as long as it takes to brush out of your cat’s hair and vacuum your flooring. You must reapply with all the worry of breathing dust particles and the mess of removing pets from the area and covering other areas.

Products Containing Tetrachlorvinphos:

Tetrachlorvinphos (TCVP) is the active ingredient used in the Hartz Ultraguard Flea and Tick Carpet Powder. TCVP was used beginning in 1966 as a crop treatment and canceled as such in 1987. “Tetrachlorvinphos was revoked for use in the European Union as of 2003 under Directive 91/414/EEC (European Commission, 1991)” according to the NCBI. In 2009, the National Resources Defense Council (NRDC) contacted the EPA and subsequently filed suit against the EPA to remove all pet products containing Tetrachlorvinphos (TCVP) from the market. The EPA denied the request to take all products off the market (see EPA’s report), but the “EPA has determined that all of the dust/powder products have residential post-application risks of concern….” According to the EPA’s document, the overall study to evaluate human exposure to organophosphates won’t recur until 2022. In the meantime, the EPA conducted an abbreviated evaluation and combined those results with an NRDC submitted a study. Both studies concluded that human life is at risk when using dusting products containing TCVP. Toddlers who frequently touch animals and then touch or put their fingers in their mouths are at an increased risk. Exposing children to TCVP at such a young age could negatively impact their neurological systems.

One of the EPA’s primary excuses in declining to take all products off the market and encouraging Hartz to voluntarily take their products off the market before 2021 is the negative impact on people of lower financial means who count on these flea products during flea season. Therefore, the “EPA believes the request by Hartz to allow for the production of these products until July 31, 2020, and sale and distribution of existing stocks until March 31, 2021, is reasonable. Yes, these products are cheap. However, comparably priced products, such as baking soda and FleaBusters RX for Fleas Plus Powder, are much healthier for your family and pets.

Finally, for those who care about their pets as members of the family, we have to wonder, what are the potential risks to cats who consistently self groom? A study completed by the International Agency for Research on Cancer found a significant risk of developing multiple cancer types when testing this chemical on mice. According to MedVet, “Common signs of toxicity from flea products containing organophosphates are diarrhea, vomiting, difficulty breathing, small pupils, muscle tremor, weakness or falling over, and drooling. Organophosphate toxicity can be rapidly fatal, depending on the ingredients and dose the pet is exposed to.” We cannot say with certainty that harm will come to you, your family, and your cats by using TCVP. However, given all the data we’ve gathered, we would recommend not purchasing the Hartz product.

Products Containing Pyrethrin:

The majority of flea powder products on the market contain Pyrethrins. These products include:
Hartz UltraGuard Plus Flea & Tick Pet Carpet Powder, Adams Flea & Tick Carpet Powder, PetArmor® Home Flea & Tick Carpet Powder, SENTRY® HOME Flea & Tick Carpet Powder, Bio Spot Active Care Flea & Tick Carpet & Upholstery Powder and Zodiac Flea & Tick Powder for Dogs Puppies Cats & Kittens Citrus

In reading the warnings provided by one of these manufacturers, we found this: “Do not apply this product in a way that will contact adults, children, or pets, either directly or through drift.” All of the related precautionary statements for Pyrethrins can be found on Drugs.com. When using these powders, you should vacate your residence for a minimum of 24 hours. And, then, the residual powder is still of grave concern. According to an academic study in 2016, pyrethrins are “extremely toxic to cats.” Exposure to this active ingredient can cause “characteristic clinical signs such as seizures (80%), muscle fasciculations (9%), tremors (95%), hypersalivation (100%) etc.” “Cats may be exposed from cutaneous application of topical products, oral ingestion, and direct contact with topically treated dogs.” Zodiac has gone as far as to suggest applying its product directly to your cat. Because this product poses a significant health risk to your cats, we recommend a DO NOT BUY for all these products.

Products Containing Essential Oils:

Many flea powders contain essential oils which have been converted to powders. These products include NaturVet Herbal Flea Cat & Dog Powder, Only Natural Pet EasyDefense All-in-One Flea & Tick Dog, Cat & Home Treatment, and Natural Care Flea & Tick Carpet Powder. Products containing essential oils do not kill insects and are also very toxic to cats.
Geraniol, Peppermint, Cornmint, Thyme, Rosemary, and Lemongrass Oils are used, in various combinations, as active ingredients for the products we reviewed. Texas A&M University’s Veterinary Medicine and Biomedical Sciences classify all of these oils as toxic to pets. And, According to the ASPCA, “Cats are especially sensitive to essential oils, and effects such as gastrointestinal upset, central nervous system depression, and even liver damage could occur if ingested in significant quantities. Inhalation of the oils could lead to aspiration pneumonia. There are significant variations in toxicity among specific oils. Based on this, we would not recommend using essential oils in areas where your pets have access unless pets are supervised or the use of the oil is approved by your veterinarian.”


Availability:

All the flea powders we reviewed are available over the counter on Amazon, Chewy, Petco, PetSmart, or other retail outlets.