Heartworms have been found in animals worldwide, and in all 50 US States, posing a risk to all of our beloved pets. Because heartworms are transmitted by mosquitoes, it is important to consider the climate, the length and severity of "mosquito season," and the rate of heartworm incidence in your area when planning the best heartworm prevention plan for your pet. A good holistic veterinarian can help you determine what an appropriate heartworm prevention plan should include for your pet, and what role a natural herbal preventative like our HW Protect can play in helping to prevent heartworm disease in your companion.

Only Natural Pet HW Protect Herbal Formula offers an herbal alternative to the chemical heartworm prevention methods available, without the degree of side effects that have been documented with their use. Chemical heartworm preventatives work by continual administration of a low dose of insecticide to kill any developing microfilariae (microscopic sized baby worms). Herbal preventatives work in a similar fashion, using herbs instead of pesticides. NEITHER method kills adult heartworms, so regular testing for heartworm, at least every 6 months, is absolutely necessary regardless of what method you choose for prevention.

HW Protect Herbal Formula is intended for use as a preventative to be used during mosquito season as part of a comprehensive heartworm control program. The formula was designed with two objectives, using herbs that work together to reduce the likelihood of mosquito bites to lower your pet's risk of becoming infected, and to help eliminate existing larvae-stage parasites in the bloodstream. This tincture was developed to help prevent heartworm infestation using extracts of herbs well known for their mosquito repelling properties, and others well known for their anti-parasitic properties.

Heart worm disease (adult heart worm infestation in the heart and lungs) is a very serious health concern and treatment for heart worm disease should ALWAYS be guided by a veterinarian. If your pet already has heart worms, then we would suggest the Para-Gone Herbal Formula. If your pet has heart worm disease, then you should consult a veterinarian and follow a traditional heart worm disease treatment program, as elimination of heartworm can be complicated and carries additional risks to an animal's health.

Using an insect repellent may also help prevent heart worms by keeping mosquitoes away from pets when they are outside.

As with all herbal remedies and treatments, the healthier the animal is overall, the more effective the treatment will be. Providing your companion with the best diet along with proper health-supportive products for optimal health will go a long way to preventing disease and making them less appealing and susceptible to parasites.

Herbs and Properties for Which They Were Selected

Our herbal formula was created as a safe and effective natural preventative for both dogs and cats. It includes herbs known for their internal health and mosquito-repelling properties, such as:

  • Wormwood Aerial Parts (Artemisia absinthium) - May help eliminate microfilaria and developmental stage heartworm parasites in the bloodstream, and may help create an unfavorable environment for parasites.

  • Black Walnut Green Hulls (Juglans nigra) - Contains astringent tannins that may help kill and expel a variety of worms and other parasites.

  • Ginger Root (Zingiber officinalis) - May have specific activity against heartworms and supports a healthy inflammation response.

  • Oat Seed (Avena sativa) - A source of healthy fiber that helps maintain immune-supporting gut bacteria.

  • Andrographis (Andrographis paniculata) - is an adaptogenic herb that may offer support for parasitic infections.

  • Parsley Root (Petroselium crispum) - Has blood- and liver-purifying properties; supplies Vitamin K; and has strong antioxidant capability.


About Only Natural Pet Herbal Remedies


Our Only Natural Pet Herbal Remedies have evolved from the work of holistic veterinarians and experienced herbalists to bring you a wide selection of natural health care products for your animal companion. Herbal formulas are easy to administer and easy for your pet to assimilate, making these treatments both simple and effective. Herbs are also great natural sources of vitamins, antioxidants, minerals, enzymes, and many other nourishing substances.

Only the finest herbs are used in our formulas, and the careful selection and blending of these herbs helps them interact synergistically for stronger, more beneficial effects. Nothing is more natural than harnessing the healing powers of the herbs and flowers around us. When ill or injured, animals in the wild have an uncanny ability to seek out and eat plants with properties that will help them heal.

Natural therapies like our herbal formulas do not just attack the symptoms of a disorder. Instead they rebuild your companion’s total health and facilitate their body’s innate ability to heal itself. When natural remedies are used in conjunction with a nutritious diet, your pet can enjoy a healthier life.

The effectiveness of HW Protect Herbal Formula, as with ANY herbal or natural remedy, varies with the health of the animal. An animal being fed a high quality diet with adequate vitamins and enzymes will respond better than an animal on a poor quality diet. Each animal’s system needs support in healing from within. Please see our article, "What You Need to Know About Your Pet’s Food," for information about feeding the best quality diet.


Available in 2 oz and 4 oz liquid. Each 2 oz bottle contains approximately 1,050 drops, and each 4 oz bottle contains approximately 2,100 drops of the formula.


This product was made in a FDA-approved facility using human-grade ingredients.

Only Natural Pet brand products are 100% Guaranteed!

Suggested Use


  • This tincture may be mixed with food, applied with dropper or syringe directly into mouth, or mixed with up to 1/2 cup of warm water.

For Dogs and Cats - 3 times per day, give 1 drop for every 2 pounds of body weight up to 50 pounds, plus 1 drop for every 4 pounds of body weight over 50 pounds. For example, a 70 lb. dog would be given 25 drops + 5 drops = 30 drops, three times each day (total 90 drops).


Each 2 oz bottle contains approximately 1,050 drops, and each 4 oz bottle contains approximately 2,100 drops of the formula.


Please Note

An herbal approach to heartworm prevention is not like a traditional heartworm pharmaceutical preventative, which chemically kills all heartworm larvae, but it may be an effective and more natural method to prevent heartworm infection.

Consistent dosing is essential for proper protection along with heartworm testing at least every 6 months.



  • This formula is not for use in pregnant or nursing mothers, animals with kidney or liver disease, or those with seizure disorders.