@
Fantaziez, there's no need to attack anyone on the forum from having a different opinion than you, and expressing it.
I think you're confusing "natural" with "safe," and they're not at all the same. Poison ivy is totally natural, but nobody who's allergic to it and in their right minds would want to come into contact with it.
While it's true that many medicines are derived from natural chemicals, they're often not strong enough in their "natural" state to be effective, and require concentration and processing to be so. Digitalis, a heart medicine, is derived from foxglove, but it would take an unknown quantity of foxglove for treatment, because there's no way to know how effective it is.
Animals CAN be overdosed with ivermectin, as they can with almost anything. But it is safe when used as directed, which is all anyone is suggesting.
If you'll take a look at the Gorgeous Guineas website, you'll notice that Lice n Easy is listed under therapeutic shampoos, which carry the note that they contain additional active ingredients, but they don't say what those are. So you're choosing to use unknown compounds on your pig instead of one that has been proven safe and effective for animals and people for many years. That's your choice. Just don't get bent out of shape when someone disagrees with you.