I've used Ivermectin, and it's been the injectable product, which I dose either orally or on the skin, at one ml. per about 80 pounds body weight. I used a TB syringe to dose it effectively on each bird. My notes talk about 0.2 mg. per kg. for most birds, so about 0.1 mg. per pound body weight.
It kills most parasites, which is wonderful, but isn't approved in the USA for chickens, not so wonderful.
Mary
It kills most parasites, which is wonderful, but isn't approved in the USA for chickens, not so wonderful.
Mary