Please help! We've been having a major problem with worms in my herd. My vet did fecals, checked for cocidia, which was negative, and said to use ivermectin . Followed her instructions, over 3 weeks ago, but havent seen any improvement. As a matter of fact, i lost one of my girls this week. Please help!! My others don't look as sick as she did, but I know we still have a heavy worm load. I am absolutely sick over her dying, so any advice will be appreciated.