01Why routine drenching is out
For years, horses were wormed every few weeks on a calendar. Australian veterinary guidelines now say routine interval worming of adult horses is no longer recommended, because it has driven widespread resistance to worming products.
Instead, the modern approach is targeted worming — testing first, then treating the horses that need it.
02Faecal egg counts (FEC)
A faecal egg count measures worm eggs per gram (epg) of manure. It's inexpensive and many vets and suppliers offer it.
| Result | Eggs per gram | What it means |
|---|---|---|
| Low shedder | Under 200 epg | Around two-thirds of adult horses. Often need minimal treatment. |
| Moderate | 200–500 epg | Treatment decisions made with your vet. |
| High shedder | Over 500 epg | Contaminate pasture most; usually treated more often. |
- Test three to four times across the first year to learn your horse's shedding pattern.
- Treat based on the results and your vet's advice.
- Periodically check the product is still working with a faecal egg count reduction test — a second count about 14 days after worming.
03Pasture hygiene helps
- Removing manure two to three times a week in warmer months stops larvae reaching the grass.
- Resting and rotating paddocks reduces the worm burden on pasture.
- Avoid over-stocking a paddock.
Regular manure management and rotational grazing in rested paddocks are part of the Full Care package.
04Vaccination
Talk to your vet about a vaccination program that suits your horse. Commonly discussed vaccines in Australia include:
Tetanus
Horses are highly susceptible to tetanus, which can follow even a small wound. The vaccine is extremely effective once the initial course is complete, and boosters keep immunity up.
Strangles
A contagious respiratory disease. Vaccination can reduce the severity of illness, though it doesn't prevent every infection.
Hendra virus
Historically associated with Queensland and northern New South Wales. Ask your vet whether it's recommended for your horse's circumstances and travel.