I've seen several posts about using Ivermec to worm goats. I picked some up yesterday of the pour on type but I'm not sure how much to use or how to use it. Do you pour it all over them like a lye dip or is it more like a dog w/flea spot treatment and goes between their shoulders??? I'm not really sure how much they weigh and the feed store didn't have a goat tape. I would guess that they weigh between 40 and 70 pounds. Any help you all can provide would be appreciated.