sorry all. i confused my anti-industrialized farming speech with my anti-medication speech (they usually go hand in hand anyway).
i still don't use medicated feed. Akane put it much better than i. glad someone could make our point without sounding like a moron!
ella, your post is really informative. if you really want to medicate, knowing exactly what does what is extremely important. have you ever heard of using raw goats milk instead of amprolium medicated feeds? i've been told by several other organic farmers that it prevents cocci (i'm giving it a try, but won't have any results for a bit). i wonder if something in the goat milk works the same way as the amprolium or if it just that it introduces the protozoa in manageable increments.
another reason i'm glad i don't use medicated feed now: i'm highly allergic to sulfa and don't really want 100s of lbs of sulfonamides laying around. yes, it making me sick is unlikely, but a risk i'm not willing to take.