diatomaceous earth for fleas on cats

Diatomaceous Earth For Fleas On Cats – Is It Really Any Good?

Flea season has arrived!

What is diatomaceous earth and how does it control fleas?  ​

This is what it looks like. 

This is what diatomaceous earth looks like

It looks like powder

Diatomaceous earth is a​ non chemical method of flea control for your cat. So far so good, no chemicals.

It is going to take a little more effort on your part than putting a flea collar on your cat or applying flea drops. However, this is a​ chemical free option for your cat which can also be used to get rid of fleas from around your home. Plus you can use it on the dog too.

Note the little bit more effort part though.

You may choose to use diatomaceous earth in conjunction with other products. Good idea!

In a hurry? Head straight to Recommendations (link in the Contents) for a quick summary of our current recommendations.

What is Diatomaceous Earth?

Diatomaceous earth is a naturally occurring, soft, siliceous sedimentary rock that is easily crumbled into a fine white to off-white powder.  

The powder can have an abrasive feel, similar to pumice powder.

It looks like powder but is actually a mineral dust.

Melos - Diatomaceous earth

If you ever go to Greece, (yes please) this is Sarakiniko Cove on the island of Melos.  The white mineral dust that looks like beach sand is Diatomaceous Earth.

How Does Diatomaceous Earth Kill Fleas?

Diatomaceous earth is made up of tiny organisms called diatoms which scratch away at the waxy layer of the exoskeleton of the flea.

Moisture from the body of the flea evaporates and the flea dehydrates and dies​.

bag of diatomaceous earth

Diatomaceous Earth is usually purchased in resealable bags or large screw top plastic containers.

Should I Apply Diatomaceous Earth Directly On My Cat?

​Use a squeeze bottle as shown in the video. This will ensure that small amounts are puffed out as needed. This will mean less wastage and less dust and you will not be covering the cat in dust. ​

​Here is a video that shows how to apply diatomaceous earth to your cat.​

Does Diatomaceous Earth Work For Killing Fleas?

It does work, bear in mind that you will need to be vigilant about treating areas around the home plus places like the scratching post and any other places the cat likes to ​hang out.

Cats that spend time outdoors should be treated weekly and indoors cats, once a month.

​Diatomaceous Earth Reviews

​We have reviewed four Food Grade Diatomaceous Earth products.  All are safe to use on your cat to combat fleas using a natural, non chemical method.

All of the products reviewed here are 100% food grade. This is what you need to use if you are using it for treating fleas on your cat. 

Diatomaceous earth that is not food grade is a very effective insecticide however as this article is specifically about cats, only 100% food grade products will be reviewed.

Where Do You Get Diatomaceous Earth?

Buying diatomaceous earth online is convenient because the larger bags are pretty heavy and it is convenient to have it delivered. Once you have the bag at home the product can be decanted into smaller more manageable containers.

​Look for the Food Grade label.

Diatomaceous Earth Food Grade

Diatomaceous Earth Food Grade Diatomaceous Earth Food Grade 10 Lb

This product is OMRI listed so is approved for organic use.

It is packed professionally using stainless steel machinery to prevent the risk of contaminants. This is 100% pure diatomaceous earth.

It is safe for the family including children and pets.

The product comes in a large paper recycled bag that can be folded closed to keep the product fresh.

There are different sizes available 1lb, 2lb, 5lb, 10lb to suit your needs.

This is a great natural remedy that can be used not only on your cat but other pets and also around the yard and in the garden. It is sourced from one of the purest food grade mines.

Although the bag looks like a plain paper bag in the image, it is actually thick and sturdy for repeated opening and closing.

It can be dusty when applying so as a precautionary measure use a mask when using large quantities of the product.
This advice applies to any diatomaceous earth product. Avoid using on windy days.


Fossil Power - Diatomaceous Earth Food Grade Powder

Diatomaceous Earth Food Grade Powder - Resealable Bag - Safe for  PetsDiatomaceous Earth Food Grade Powder – 5 lb. Bulk Resealable Bag – Safe for Human and Pet Consumption or Organic Outdoor Uses with Dust Applicator – Detoxify Your Body Inside and Out

This is safe for animal and human consumption because it is food grade Diatomaceous Earth.

There are no additives or chemicals in this product.

It is available in a 12 lb, 2 lb and 5 lb bag. The link goes to a 5 lb bag so if you need a different size remember to change the size of the bag on the order page.

Dust onto your cat’s fur. Using a spreader or applicator makes the application much easier. Think powder and you will have the general idea. You may have something at home you could use as a dust applicator.

Use as directed and take precautions if applying on a windy day and take reasonable precautions to avoid ingesting the powder during application.​

Bio-D Food Grade Diatomaceous Earth

Food Grade Diatomaceous Earth for fleas on catsBio-D Food Grade Diatomaceous Earth (4-Pound Pail)

No Chemical additives and it is 100% food grade.

The product has no shelf life so as along as it is stored correctly it will last indefinitely. The lid to the container is apparently very tight so for long term use that is a big plus however that means the lid may be difficult to remove, so if you suffer from arthritis in the hands or a similar condition the lid may be difficult to manage.

It is an OMRI listed product and comes in a 4lb pail with scoop.
It also kills bugs other than fleas.

Some people use the product for joint pain and other ailments however this would require further research if this applied to you.
This product is a great natural remedy that can be used not only on your cat but other pets and also around the yard and garden.​

 Food Grade Diatomaceous Earth to control fleasNature’s Wisdom Food Grade Diatomaceous Earth 3 lb. Jar

This product is also 100% diatomaceous earth and is food grade.

Nature’s Wisdom say that this product is sourced from a food grade deposit that has pure water. The diatoms (that make up diatomaceous earth ) are harder from pure water supplies than ones found where the water supply is salt water.
Treats many other types of troublesome bugs, plus bed bugs in addition to fleas.

As mentioned earlier, this is a fine powder so be sure to empty the filter of the vacuum cleaner regularly when using this product as the fine powder may clog the filter.

Diatomaceous Earth Spreaders/Applicators

These are two very useful applicators/spreaders for applying diatomaceous earth.

  • The spreader by Harris is specifically for diatomaceous earth.
  • The spreader from Practi products has an adjustable hole size which makes it useful for spreading other products also.

Harris Diatomaceous Earth Powder Duster

This handy little product makes spreading diatomaceous earth so much easier.
Simply twist off the top, fill with powder and it is ready to use. Apply gentle pressure when squeezing and the product will puff out. The long nozzle means that you can get into all those tricky spots that are difficult to reach. The powder will go where you want it to go with this product.
If it starts to clump just turn upside down and give a little shake.

Depending on the amount of pressure you give when squeezed will affect the amount of powder coming out. Experiment with different pressure to get it just right for your needs.

How Is Diatomaceous Earth Used Around The house To Control Fleas?

The video showed how to use diatomaceous earth on your cat however you can also use diatomaceous earth in your home to get rid of fleas.

First of all think of all the places your kitty likes to hang out. There’s probably quite a list of current favorites.

Sprinkle the dust lightly in those areas and don’t forget all the nooks and crannies.

When applying the dust to tight spaces, an applicator is a good idea and will ensure you don't sprinkle more dust than you need.

Don’t forget to dust the scratching post because as this is covered in carpet it will be a lovely home for fleas. Work the dust into the carpet with a brush. Vacuum the dust approximately 12 - 24 hours later and reapply as necessary.

Be mindful of the fact that diatomaceous earth can be hard on a domestic vacuum cleaner so be sure to check the filter and vacuum small areas at a time.

It is non toxic to humans (using the food grade diatomaceous earth ) however it is still a dust and it is advisable to just take a normal amount of care to ensure that you are not breathing in volumes of the dust.

​This ​Is Another Method ​​Of Applying Diatomaceous Earth To Your Cat


Diatomaceous Earth is a trusted company that makes an absolutely top quality product and is ​our first product of choice.  

All of the products are of a very high quality. They are all food grade which is essential as explained in the article. 

A larger size that can be delivered to the door and will last for a long time. 

You may prefer a plastic tub as used in  Bio-D   or  Nature's Wisdom  for ease of handling, as opposed to a softer sided bag.

Diatomaceous Earth and Fleas