I respectfully disagree with those who don't think Ivermectin is effective. However I have never used the paste, and the method of using the injectable solution in water is not very well known. When you have a large flock to treat, I find it the easiest, as instead of having to medicate individual birds, you can medicate all at once by putting it in the water. And from the research I've done on using THAT method, it is very effective. Certainly my experience with it was extremely positive.
