It appears that I have a goat with an Ivermectin resistant lungworm. He eats, drinks, acts just fine, but has a nasty cough that we haven’t been able to get rid of. Tried LA 200 for 5 days, no change. Ran him on Ivermectin, correct dosage, injected, cough went away for 8 days and then returned, dosed him again at day 10 with Ivermectin, cough went away for another 8 days, and then returned, gave him the third Ivermectin dose and again the cough went away and then came back. So, we are now on to Prohibit to try and kick this. We wormed last night and he has not coughed at all today, was coughing 2 – 4 times a day every day before today, so it isn’t allergies. How often should I worm him with the Prohibit to really knock this out? Should it be run the same way as the Ivermectin? Every 10 days, more frequently, once?