Parasite Prevention for Donkeys: Deworming, Fecal Testing, and Pasture Hygiene

Older equine parasite programs often rotated dewormers on a fixed calendar. Current guidance has shifted away from that approach because it can increase drug resistance without improving health outcomes. The American Association of Equine Practitioners recommends using fecal egg counts once or twice yearly to identify low, medium, and high shedders, then targeting treatment more thoughtfully.

That does not mean donkeys should never be dewormed. It means deworming should be based on evidence, season, age, exposure, and herd risk. Many adult equids still receive baseline treatment once or twice a year, with additional treatment for higher shedders or special situations such as new arrivals, young animals, or suspected parasite-related illness.

A fecal egg count measures the number of parasite eggs in manure, usually reported as eggs per gram. It is most useful for monitoring strongyle shedding and helping your vet decide which animals are contributing the most pasture contamination. A fecal egg count reduction test compares counts before treatment and about 10 to 14 days after treatment to check whether a dewormer is still effective on your farm.

Fecal testing has limits. It may miss immature or encysted parasite stages, can underestimate tapeworms, and usually does not diagnose pinworms well because eggs are often laid around the tail area instead of passed in manure. That is why your vet may combine fecal results with physical exam findings, age, body condition, season, and herd history.

Good pasture management lowers parasite exposure for the whole group. The most helpful step is regular manure removal from paddocks and pastures, ideally every 24 to 72 hours and at least twice weekly when possible. Strongyle eggs can hatch and develop into infective larvae within about 5 to 7 days under favorable conditions, so frequent manure pickup matters.

Other useful steps include avoiding overstocking, preventing overgrazing, mowing rough areas, feeding hay in racks instead of on bare ground, quarantining and testing new arrivals, and composting manure before spreading it. In some settings, cross-grazing with other species can reduce equine parasite burden because many equine parasites do not complete their life cycle in cattle, sheep, or goats. Your vet can help decide whether that makes sense for your property.

Some donkeys with parasite burdens show no obvious signs at first. Others may develop weight loss, a rough hair coat, poor body condition, diarrhea, recurrent mild colic, reduced appetite, or lower energy. Young animals are at higher risk for heavy roundworm burdens, while adults more often deal with strongyles and other chronic exposure issues.

See your vet promptly if your donkey has colic signs, diarrhea that lasts more than a day, rapid weight loss, weakness, swelling, or a sudden decline in appetite. Parasites are only one possible cause, and these signs can overlap with dental disease, ulcers, liver disease, sand accumulation, or other serious problems.

Costs vary by region, travel fees, and whether testing is done through your vet or a diagnostic lab. In many U.S. settings, a fecal egg count runs about $25 to $65 per donkey, while a fecal egg count reduction test may total $50 to $130 per donkey because it requires pre- and post-treatment samples. A tube of equine dewormer commonly costs about $8 to $25, depending on the active ingredient and whether it includes praziquantel.

A full herd plan may also include a farm call, exam, weight estimate or scale use, and follow-up recommendations. For pet parents managing multiple donkeys, targeted treatment based on testing can sometimes lower the annual cost range compared with blanket deworming, while also helping preserve dewormer effectiveness.

Many donkey parasite programs include: routine manure removal, one or two fecal checks per year for adult donkeys, annual FECRT on the farm or in the herd, quarantine and fecal testing for new arrivals, and strategic treatment for higher shedders or seasonally important parasites. Young donkeys, seniors, thin animals, and those with chronic health issues may need closer monitoring.

You can ask your vet to help you build a written plan for your property. That plan may include which donkeys to test, when to sample, what egg count level triggers treatment in your herd, how to dose accurately by body weight, and how to track results over time. A written plan makes it easier to stay consistent and avoid unnecessary treatment.