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Natural flea control for dogs and cats

Why chemical pesticides actually bring more fleas

Each flea season, pet owners dip, spray, spot-treat, medicate, shampoo, powder, and collar their dogs and cats with potent pesticides in an effort to kill fleas. When new fleas appear, they trigger another round of flea-killing poisons. This continual toxic exposure pollutes the liver and wreaks havoc with the immune system, making the now weakened animal a bigger flea magnet than ever. Additionally, the fleas that do survive the chemical assault become insecticide-resistant “super fleas.”

A saner approach to flea control is to get rid of fleas from your animal and your home without poisons while building your pet’s natural resistance to fleas with supplements and a good diet. Occasionally, a spot treatment may be necessary to deal with an infestation, but other, health-building methods should be used at the same time to reduce reliance on this more hazardous chemical route.  

Diet alone plays a surprisingly large part in flea-proofing your pet, so don’t overlook the importance of feeding a high quality, all-natural food, and adding some immune-building raw foods to your pet’s diet. 

Use a flea comb to test for fleas

Not every itchy animal has fleas! Many pets that start scratching in warm weather have seasonally triggered allergies that can be helped with special allergy foods, digestive enzymes, and other supplements. To check for the presence of fleas, comb around the groin area and base of the tail. A flea comb has very finely spaced teeth to capture live fleas and the tiny egg sacs that cling to your pet’s hair. Even if you don’t see any fleas, you may find flea dirt—black specks of digested blood that fleas excrete on your pet. Flea dirt indicates the presence of fleas and leaves a red trail as it dissolves in a glass of water. 

Step 1: healthy from the inside – supplements for flea resistance

The long-term solution to fleas is to make your pet an unappealing host. Flea resistance starts from within, in the inner workings of the immune system. Like other parasites, fleas are Nature’s scavengers, attacking the most vulnerable, thinning out the herd to preserve the food supply for the healthy. Because of their weaker immune systems, the old, the young, and the sick are a flea’s primary targets. Low vitality and poor immune function attract fleas, and a strong, vital life force repels them. 

Your pet’s first line of defense is healthy skin. The natural oils in supple, unbroken skin make it harder for fleas to bite, and skin oils can plug up fleas’ breathing holes. Dry, flaky, or broken skin is a flea’s delight. Whatever improves skin condition will help flea proof your animal. This is where supplements come in.

The most important nutrients for flea resistance and good skin condition are nutritional sulfur, essential fatty acids, and digestive enzymes. Dietary sulfur, a building block of many amino acids, is an internal flea repellent and a biological marker for good health. In sufficient quantity, sulfur imparts a scent to the skin that keeps fleas away. 

Essential fatty acids (EFAs) bathe the skin cells in conditioning fats. In addition to promoting stronger, more resilient skin, they reduce flaking, shedding, skin inflammation due to flea allergies and improve immune system function. We recommend Wisely Pollock Oil or Wisely Salmon Oil. 

Because they greatly enhance the utilization of all nutrients, digestive enzymes improve the effectiveness of any nutritional flea remedy, helping it to work faster and more completely. Enzymes can help lessen flea bite allergies! Our own brand, Enzymes Plus, is a blend of plant-grown digestive enzymes, rosehips ( a natural source of Vitamin C) and kelp, a good source of the trace minerals that catalyze enzyme activity. Results will be visible in two to six weeks, depending on your pet’s age, health, and size. Using these supplements year-round will improve overall health and prevent fleas from gaining a toehold at the beginning of each flea season.

Step 2: remove fleas from your pet without poisons

Using a chemical pesticide directly on your pet, whether a spot treatment, spray, or dip, is never completely safe. Traditional chemical flea collars are especially dangerous, radiating nerve poisons that pass into your system as well as your pet’s. Topical products contain central nervous system toxins that can be absorbed through the skin and ingested when animals lick themselves. If a pesticide product is used occasionally for its “quick kill” results, switching to safer natural means as soon as fleas are under control is the wisest course. Sick, weak, or very young animals should never be treated with pesticides. Fortunately, Mother Nature has provided some natural substances that can eliminate fleas safely. Our favorites are discussed below.

Fleacombing, spraying, powdering, and shampooing

Fleacombing removes live fleas crawling on your pet, along with any flea dirt and eggs. Shampooing drowns fleas and washes away the skin flakes that attract more fleas. Use a non-drying shampoo so you don’t strip away the beneficial oils building up on the skin. If the skin is very damaged, dilute the shampoo with an equal amount of healing aloe vera from a health food store.

Another natural method of flea control on your animal uses pungent essential oils to chase them away. The pure neem oil in All The Best Oatmeal And Neem Oil Pet Shampoo provides relief from the itching, biting, and scratching that is associated with fleas and ticks. Other insect-repelling essential oils are cedar, orange, citronella, pennyroyal, eucalyptus, and lavender. Some animals, especially cats, can be sensitive to them, so apply sparingly, especially around the head. Excessive drooling is a common indication that the mixture is too strong. You can try diluting with water to reduce the pungency. A completely non-toxic way to flea-treat a dog or a cat topically is to dust the skin with food-grade Diatomaceous Earth. The inert microscopic crystals dry fleas out and clog their breathing holes, causing them to die eventually, but it’s not harmful if licked or ingested by you or your pet.

Step 3: treat your indoor environment

If you see fleas crawling on your animal, you can be sure that there are more hidden somewhere in your home. Adult fleas lay eggs on their host which in time drop off to hatch in the places where your pet walks or lies down. Carpeting and furniture become the “nursery” where baby fleas develop into adults before hopping back on to feed. If you can eliminate the eggs and larvae, the adults will soon disappear as well. Even when using a pesticidal spot treatment, it’s still important to use some type of premise control for new fleas carried in from outside. 

Borate crystals are our treatment of choice for their safety, ease of use, and effectiveness. For many households, this is all the flea control needed if used early in the season. The fine borate powder is sprinkled into carpeting, flooring and upholstery where it is virtually undetectable. There it kills larvae and eggs by a mechanical process of abrasion and dehydration. Unlike conventional poisons, fleas cannot become immune to the effects. One treatment will kill fleas for an entire year. Fleago borate crystals are not toxic to people, pets or plants. After applying, allow two to three weeks for fleas to disappear. Lumino Diatomaceous Earth can be used on floors and carpets as well as on animals. Sprinkle lightly in the house and in your vacuum bag to kill hatching larvae. 

What about spot treatments?

We don’t recommend monthly spot treatments as a permanent solution to fleas because they contribute to the toxic load the body must eliminate to remain healthy. But during an infestation, even the most careful pet parents may occasionally resort to their use. If you do this, limit it to one application to get the flea population down to zero, and then launch a non-toxic program of improved diet, flea supplements, and indoor environmental controls.


Never use a spot treatment on a sick animal, or use in combination with other chemical pesticides, such as a dip or a spray.

Discontinue use if you notice lethargy, foaming at the mouth, or skin irritation and hair loss at
the application site.

Cats have more side effects than dogs, and some cats such as Persians and Himalayans, should not be treated at all.

On any animal, whether dog or cat, you can try a partial dose and wait a day or two to gauge the effect before using the entire tube.

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