BioWorma for Goats: Dosing, Efficacy, and How It Breaks the Worm Cycle
Deworm a goat, and you've solved half the problem. The worm eggs already sitting in the pasture are still there, waiting for the next grazing pass. Within a few weeks, the same herd can be right back where it started, and that reinfection cycle is a big part of why parasite control in goats feels like a losing fight, no matter how good the dewormer is.
BioWorma doesn't try to out-dose that cycle. It goes after the part of the problem chemical dewormers were never built to reach: the pasture itself.
Why Goats Are Especially Hard to Keep Ahead Of
Goats graze close to the ground, closer than sheep or cattle typically do, which puts them in more direct contact with larvae sitting in manure and on grass. They're also more susceptible to Haemonchus contortus, the barber's pole worm, than most other livestock. Add in how widespread dewormer resistance has become in goat operations specifically, and you end up with a herd that keeps reinfecting itself faster than most treatment schedules can keep up with.
BioWorma isn't a replacement for the dewormer. It's what handles the part the dewormer walks away from.
How It Actually Works
BioWorma is built around Duddingtonia flagrans, a fungus that occurs naturally in soil. Mixed into feed and fed daily, its spores are tough enough to survive a goat's entire digestive process untouched, and they come out the other end in the manure exactly as they went in.
That's where the real work starts. Once in the manure, the spores germinate and grow small trapping structures, and those traps physically catch, immobilize, and consume worm larvae before they can develop and migrate onto pasture. Fewer larvae make it out. Less contamination lands on the grass. The herd grazing that pasture next picks up a smaller dose of reinfective material than it would have otherwise.
Worth being clear about what this isn't: BioWorma does nothing to worms already living inside the animal. It has no effect there at all. Its entire job happens after the fact, in the manure.
What the Data Actually Shows
BioWorma's own published goat research draws on several independent field trials, and results vary depending on what was measured. Reductions in fecal egg counts have been reported around 58%. Reductions in total worm counts in tracer animals have reached as high as 87%. One trial measuring larval emergence from coproculture reported reductions of up to 99.5%, and an earlier trial described "virtual elimination" of worms under field conditions.
That range matters more than any single headline number. Different studies measured different things: egg counts, worm counts, larval emergence, and results vary with the parasite species involved and how each trial was designed. What's consistent across them is a real, well-documented reduction in worm burden and pasture contamination, not one fixed percentage, but a pattern that holds up across multiple independent studies.
The Worms It's Actually Targeting
BioWorma is labeled for the major gastrointestinal nematodes affecting sheep and goats: Barber's Pole Worm (Haemonchus), Black Scour Worm (Trichostrongylus), Brown Stomach Worm (Teladorsagia/Ostertagia), Nodule Worm (Oesophagostomum), Thin-necked Intestinal Worm (Nematodirus), and Hookworm (Bunostomum). That list includes larvae from strains that have already developed resistance to chemical dewormers, since the trapping mechanism doesn't care what the worm has evolved resistance to. It's a physical trap, not a chemical.
Dosing, in Practical Terms
Dose by bodyweight, and use the heaviest animal in the group to set the rate for everyone. The labeled rate is 0.1 oz of product per 100 lbs of bodyweight per day, up to 1,200 lbs. Past that, add another 0.1 oz per additional 100 lbs.
Mix it thoroughly into feed, supplements, premixes, or concentrates, and feed it every day. This isn't a product you cycle on and off. It's meant to run continuously during the stretch of the year when conditions favor larval development, generally anytime temperatures stay above 40°F, which for most parts of the country is most of the grazing season.
Who Needs It Most
Not every goat in the herd carries equal risk. Two groups matter more than the rest: young goats, roughly 3 to 18-24 months old, and periparturient does, meaning does in their last month of pregnancy and through nursing. Both groups run with lower immune resistance during these windows, which makes them both more vulnerable and a bigger source of manure contamination than their body size would suggest.
That said, don't write off the rest of the herd. A healthy adult with a low fecal egg count is still putting a real volume of manure on the ground, and it's easy to underestimate how much that adds up.
Getting Started the Right Way
The order matters here. Treat the herd with an appropriate chemical dewormer first, to clear out what's already there. Then, if you can, move them onto pasture that hasn't carried goats or sheep in at least six weeks. Once that's done, start daily BioWorma feeding and keep it going, not as a short course, but as a standing part of the program. Producers stocking up on other goat husbandry essentials often set this up as part of a broader routine, not a one-off purchase.
One thing worth setting expectations on: BioWorma won't touch contamination that's already built up on a pasture. It only slows what's coming next. The earlier it's in the rotation, the more ground it covers over a full season.
Where to Buy BioWorma for Your Herd
Once BioWorma's part of the routine, the hard part usually isn't the feeding; it's staying consistent through the season without a gap in supply.
Exotic Animal Supply is one of only two authorized sellers of BioWorma in the United States. Orders placed before 2 PM EST ship same-day out of four climate-controlled warehouses across Texas, Florida, and North Carolina, so a herd already on the program isn't stuck waiting.
Frequently Asked Questions
Does BioWorma kill worms already in my goats?
No. BioWorma does not affect worms living inside the animal. It works entirely in the manure, targeting the next generation of larvae before they migrate onto pasture. Goats still need to be treated with a chemical dewormer first to clear an existing worm burden.
How is BioWorma different from a regular dewormer?
A dewormer treats the animal. BioWorma treats the pasture, indirectly, by breaking down worm larvae in the manure before they can develop and spread. The two work at different points in the parasite's life cycle and are meant to be used together, not as alternatives. For a closer look at how BioWorma compares to Livamol with BioWorma, see our complete guide.
How much BioWorma do I feed my goats?
The labeled rate is 0.1 oz per 100 lbs of bodyweight per day, based on the heaviest animal in the group, up to 1,200 lbs. For groups over 1,200 lbs combined, add another 0.1 oz per additional 100 lbs.
How often does BioWorma need to be fed?
Daily, without interruption, during the part of the year when temperatures stay above 40°F and conditions favor larval development. It's meant to be part of an ongoing program, not a short-term treatment.
Which goats benefit most from BioWorma?
Young goats between roughly 3 and 18-24 months old, and periparturient does (last month of pregnancy through nursing), since both groups have lower immune resistance to worm infestation. The rest of the herd still contributes to pasture contamination and should stay on the program too.
Does BioWorma work on dewormer-resistant worms?
Yes. Because BioWorma physically traps larvae in the manure rather than using a chemical mechanism, it's effective against larvae from worm populations that have already developed resistance to conventional dewormers.
Can BioWorma be used with other livestock, not just goats?
Yes. BioWorma is labeled for sheep, goats, cattle, and horses, and is also used in other grazing animals including deer, alpacas, and zoo species.