No, I have had local vet test droppings, find worms, then I treated the birds and droppings tested again and no worms. Also, I have found worms in droppings myself. I also have blackhead on the property & it prevented me from keeping turkeys on free range. Since I regularly deworm the flock with ivermectin in the water, I have free ranged my turkeys & not had any incidences of blackhead. I still raise poults on oregano oil in their water because if they get blackhead, they die quickly. Oregano oil prevents blackhead for whatever reason.
Also, I get mites once or twice a year, every year without fail. I find them to be extensive, on many birds because they spread rapidly through my flock. I then treat with ivermectin, nothing else and then I have no mites. I don't need anyone to tell me it does not work because it works for me. I am not disputing that it is not water soluble. However, it seems to mix with the water causing it to be foamy (I put the ivermectin in, then the water.). If it doesn't work for you, then don't use it. My vet told me 14 days withdrawal on eggs and I trust him. I have been using it for more than ten years.
As I indicated, I don't eat the meat of birds I treated. Turkeys to be slaughtered are raised solely on oregano oil in the water.
