If your Lao Vietnam goats look pale, weak, and “bottle-jawed” during the wet season, the usual culprit is a blood-sucking stomach worm called Haemonchus contortus, better known as barber’s pole worm. This guide shows you how to spot it early, deworm only the animals that need it, and slow down drug resistance so your treatments keep working. That is the real goal: fewer dead goats, not more drenching.

Why barber’s pole worm hits hardest here

Barber’s pole worm thrives in warm, humid conditions. In Laos and Vietnam, the monsoon creates the perfect nursery: warm soil, wet grass, and dense grazing. The larvae climb up the lower few centimetres of forage in the morning dew, exactly where short goats graze. One adult female can lay thousands of eggs a day, so a small problem becomes a herd problem in weeks.

Unlike other worms, this one drinks blood. That is why the main sign is anaemia, not diarrhoea. A goat can carry a heavy burden and still pass firm droppings, which fools many keepers into thinking the herd is fine until an animal suddenly collapses.

The signs that matter

• Pale gums and pale inner eyelids (white or light pink instead of deep pink).
• “Bottle jaw” – soft fluid swelling under the jaw.
• Weakness, lagging behind the herd, poor coat.
• Weight loss despite normal appetite early on.

Deworm the animal, not the calendar

The old habit of drenching every goat on a fixed schedule is the fastest way to create worms that no drug can kill. Barber’s pole worm has already developed resistance to several dewormer groups in many countries. Once resistance appears on your farm, it does not go away.

The better approach is targeted selective treatment: check each goat and treat only those showing anaemia. The practical tool for this is the FAMACHA system,