The two best dewormers are Valbazen(albendazole) and Safeguard(fenbendazole) for goats. The withdrawal period for both Valbazen and Safeguard is 14 days.
Good information!
If I may add another misconception, here's one that seems to be pretty common:
Diatamaceous Earth works as a dewormer. Not true! Diatamaceous Earth, though sometimes effective against external parasites, is pretty useless when wet, such as when it travels through a...