All-natural powder formula. Veterinarian endorsed. Made in the USA.
Atlas Natural Horse Dewormer is proven to help manage parasite load as part of a regular horse care routine. Easy to top dress on feed, it gives horse owners a straightforward, practical option that fits into everyday care.
Each complete treatment includes the full 14-day feeding routine.
Because our products are consumable animal wellness products, all sales are final once an order has shipped. For safety and quality-control reasons, we do not accept returns or exchanges, including returns for opened, used, or unwanted product.
Atlas Natural Horse Dewormer has been used and trusted for over 20 years — long before it was ever sold commercially. Word spread the way it always does with something that works: neighbor to neighbor, barn to barn.
Today, the results are documented.
In independent fecal egg count testing conducted at Michigan State University’s Veterinary Diagnostic Laboratory using the McMaster method, Atlas reduced Strongyle egg counts by 88–100% across every horse tested — six horses total.
“The Strongyle numbers are greatly reduced. These test results confirm that the deworming was very successful.”
— Dr. Paul Clemens, Auburn Veterinary Hospital, Chagrin Falls, OH
Parasites are easy to miss — until you know what to look for. Common signs of Strongyle burden include:
Left unaddressed, parasite loads can lead to intestinal irritation, blockages, and in serious cases, colic. Regular deworming is one of the simplest ways to support your horse’s long-term health.
No Ivermectin. No Moxidectin. No Fenbendazole.
Atlas contains a straightforward blend of natural ingredients: Diatomaceous Earth, Methylsulfonylmethane (MSM), unrefined salt, herbal charcoals, and natural sugars.
Read the label. You’ll know what everything is.
Pharmaceutical dewormers don’t stop working when they leave your horse. Residual compounds pass into manure and can harm dung beetles.
Dung beetles play an important role in breaking down manure and reducing the lifecycle of pests and parasites in your pasture. Supporting their activity helps maintain a healthier environment over time.
Atlas contains no synthetic deworming compounds, helping preserve this natural balance.
Proprietary blend of unrefined salt, herbal charcoals, natural sugars, Diatomaceous Earth, and Methylsulfonylmethane (MSM).
No synthetic compounds. Nothing you can’t read on a label.
Top dress on feed once daily for 14 days.
14.8g scoop enclosed.
Weight-based feeding guide:
Most horse owners use Atlas 3–4 times per year, timed around seasonal changes in parasite activity.
After treatment, monitor for:
If visible improvement isn’t seen after the first treatment, skip one week and repeat a second 14-day course.
Atlas has been independently tested and shown to significantly reduce Strongyle egg counts — by 88–100% in laboratory testing.
Most horse owners use Atlas 3–4 times per year as part of their regular care routine.
Look for improvements in coat quality, body condition, appetite, and energy. Some users report visible results, including worms passed, as early as day 2. A follow-up fecal egg count test 2–4 weeks after treatment is the most reliable confirmation.
It may be used through breeding and during pregnancy but should not be used in the month prior to foaling. Use may resume as early as 2 days after foaling.
Resistance has not been observed with this formula to date — unlike conventional dewormers, where resistance is a documented and growing concern.
No side effects have been reported based on current use experience.
