Haven't used it in years. Stopped when I had a ewe come down with a bad case of barber pole worm. Rolled back her upper eyelid and it was white (should have been pink).
Saved her with a loading dose of Valbazen.
Right. It is regional and out county extension office says to keep using what works in your area. In my area, this still works, and I had fecals run in February. As nice as Famancha is, it is not replacement for having an actual count from time to time.