FAQs

Unlike conventional dewormers that rely on chemical compounds, Atlas Natural Horse Dewormer works mechanically. The natural ingredients — including Diatomaceous Earth and herbal charcoals — microscopically abrade the outer coating of parasites, causing dehydration that is fatal to them. The charcoal component also helps cleanse the body of harmful substances including heavy metals, bacteria, and other toxins. No synthetic compounds. No pharmaceutical chemicals. Just natural ingredients working the way nature intended.

Atlas Natural Horse Dewormer has been independently tested and shown to significantly reduce Strongyle egg counts — by 88 to 100 percent in fecal egg count testing conducted at Michigan State University's Veterinary Diagnostic Laboratory using the McMaster's technique.

Yes. Atlas Natural Horse Dewormer is endorsed by Dr. Paul Clemens of Auburn Veterinary Hospital in Chagrin Falls, Ohio.

Proudly made in Garrettsville, Ohio, USA.

Proprietary blend of unrefined salt, herbal charcoals, natural sugars, Diatomaceous Earth, and Methylsulfonylmethane (MSM). No Ivermectin. No synthetic compounds. Nothing you can't read on a label.

Conventional dewormers rely on antiparasitic drug classes including macrocyclic lactones (Ivermectin, Moxidectin) and benzimidazoles (Fenbendazole). While effective, resistance to these compounds is a documented and growing problem — particularly for small strongyles and ascarids. Atlas Natural Horse Dewormer takes a different approach, working mechanically rather than chemically, with no reported resistance to date.

Top-dress directly onto your horse's feed once daily for 14 days. A 14.8g scoop is enclosed with every order. Always separate horses during feeding to ensure each receives their full individual dose. Do not exceed the recommended dosage per administration — if extended treatment is needed, continue at the recommended dose rather than increasing it.

Most conventional dewormers come in a paste or gel administered by oral syringe — which often means a fight at the gate. Atlas Natural Horse Dewormer is a fine powder that top-dresses directly onto your horse's feed. No syringe. No wrestling. Just scoop, top, and go. For the horse owner managing everything else that comes with keeping horses, that simplicity matters.

Feed once a day for 14 days (14.8 gram scoop enclosed)

125 lbs – 500 lbs 1/2 tsp per dose (1/6 scoop)

500 lbs – 750 lbs 1 tsp per dose (1/3 scoop)

750 lbs – 1,200 lbs 1 scoop per dose

For ongoing maintenance, most horse owners use Atlas Natural Horse Dewormer 3–4 times per year. During warm months (April–October) when parasite activity is highest, treat every 2–3 months. During colder months (November–March), once or twice per season is generally sufficient.

If your horse is carrying a heavy parasite burden, you may begin to see parasites passing in the manure as early as day 3 or 4 of treatment. Outward body condition changes — coat quality, weight, energy — take longer, as every horse recovers at its own rate. Complete the full 14-day course for best results.

Look for the following improvements during and after treatment:
• Improved coat quality and normal shedding
• Brighter overall appearance
• Better appetite and improved body condition
• Increased energy and vitality
• In some cases, visible parasites passed in manure

A follow-up fecal egg count test conducted by your vet 2–4 weeks after treatment is the most reliable confirmation. It's the same method used in our independent MSU testing — and it gives you a clear before-and-after picture of your horse's parasite load.

None have been reported. With over 20 years of use, veterinarian endorsed, and trusted by horse owners in all 50 states — this is a product with a long, well-established track record.

No. Because Atlas Natural Horse Dewormer works mechanically rather than chemically, parasites cannot build immunity to it. This is a meaningful distinction — resistance to pharmaceutical deworming compounds including Ivermectin and Fenbendazole is a documented and growing concern in equine parasite management. Atlas Natural Horse Dewormer sidesteps that problem entirely.

Yes. Atlas Natural Horse Dewormer is safe to use through breeding and 3–4 times during pregnancy. Do not use in the month prior to foaling. Use may resume as early as 2 days after foaling.

After foaling, monitor both mare and foal closely. Watch for loose stool — as long as manure remains solid and there are no adverse changes, it is safe to continue. Note that mares can transfer parasites to foals through milk, making deworming the mare an important part of protecting the foal as well.

Yes. There are reports of nursing foals passing parasites while the mare was being treated. Ensure both mare and foal are in good health before beginning, monitor closely throughout, and make sure both have continuous access to fresh water.

Yes. Atlas Natural Horse Dewormer is dosed by weight and is appropriate for younger horses as long as feeding instructions are followed carefully. Young horses can carry a particularly heavy parasite burden, making regular deworming especially important. Always separate horses during feeding to ensure accurate individual dosing.

Dung beetles are one of the most effective natural tools in pasture health — and one of the most overlooked. They reduce fly populations, break the parasite reinfection cycle, and improve soil health, all without any effort on your part. And unlike chemical dewormers, Atlas Natural Horse Dewormer won't harm them.

Want to learn more? Read our full guide: The Horse Owner's Guide to Dung Beetles and Pasture Health.

No. Atlas contains no synthetic compounds and has no toxic impact on dung beetle populations. Unlike Ivermectin-based dewormers — which peer-reviewed research confirms can kill dung beetle larvae in manure — Atlas works mechanically, so nothing harmful passes through to your pasture.

Want to learn more? Read our full guide: The Horse Owner's Guide to Dung Beetles and Pasture Health.

Unless there is a long history of chemical pesticide or parasiticide use on your land, you likely already have them. Walk your pastures and examine manure pats. Signs of beetle activity include holes in the surface of the pat, pats that appear shredded or rapidly broken down, and small mounds of soil alongside the pat — a sign of tunneling activity. On warm days above 70°F, dung beetles typically arrive within minutes of fresh manure being deposited.

Dung beetles can be purchased and introduced to your land. Once established, they multiply and work continuously — breaking down manure, reducing fly pressure, lowering pasture parasite burden, and improving soil health. They pair naturally with a non-chemical deworming approach like Atlas Natural Horse Dewormer, since the product won't harm the population you're working to establish or protect.