I can’t give a precise ivermectin dose for a 100-pound goat without the exact product formulation and route of use, because the amount varies a lot and overdosing can be dangerous. The safest move is to use the label on the specific goat/sheep or injectable product and confirm with a livestock vet before dosing.

A few public sources differ on dosing because they’re referring to different formulations and routes: one chart lists 1 mL per 110 lb for one injectable use and also says oral avermectin wormers should be used differently, while another goat resource lists 1 mL per 30 lb orally for Ivomec injectable used extra-label in goats. That means a “100-pound goat” could get very different amounts depending on whether you have injectable ivermectin, oral paste, or another livestock formulation.

What to do next

  • Check the exact name and concentration on the bottle or paste tube.
  • Use the goat/sheep-specific directions if the product has them.
  • If it is an extra-label use, ask a veterinarian or extension office to confirm the dose and withdrawal times for meat or milk.

Why caution matters

Underdosing can fail to clear parasites and can contribute to resistance, and overdosing can harm the animal. Because the sources conflict and some are forum-style or extra-label guidance, the product label and a vet’s advice matter most here.

Practical example

If someone says “just give ivermectin,” that’s too vague: a 1% injectable, an oral paste, and a sheep/goat drench are not interchangeable at the same amount.

SORRY, FAILED