If your goats look pale under the eyelid, lose condition despite good feed, or develop a soft swelling under the jaw, the most likely cause in a warm, humid climate is the barber’s pole worm (Haemonchus contortus). This article shows you how to spot it early, deworm only the animals that need it, and manage pasture so the parasite load stays low. The goal is fewer deaths, lower drug costs, and slower resistance.
Why this worm is so dangerous
Barber’s pole worm is a blood-feeder. It lives in the stomach (abomasum) and each worm draws blood. A heavy burden does not cause diarrhea first, it causes anemia. That is why the classic signs are pale gums, pale eyelids, weakness, and bottle jaw, not scouring. Because the damage is internal, a goat can look fine one week and collapse the next.
The worm thrives in exactly the conditions found across Laos and Vietnam: warm temperatures and moisture. Larvae climb wet grass in the morning and evening, so goats grazing low, damp pasture eat the most larvae. This is nature working against you: the worm’s life cycle can complete in about three weeks in warm weather, so numbers build fast.
Stop guessing: use FAMACHA and body condition
The biggest mistake keepers make is deworming the whole herd on a calendar. That wastes money and breeds resistant worms. A better approach is to treat individuals based on evidence.
The FAMACHA eye check
FAMACHA is a real, well-established method