Panacur is a highly palatable apple-cinnamon flavored wormer that covers a broad spectrum of worms. Very easy on your horse, and perfect for sensitive horses, it is safe on all ages and breeds of horses, as well as for pregnant or lactating mares. It can be used up to five days in a row for severe worm cases. If you don’t know your horse's worming history, it's an ideal first-time wormer, as well as an excellent rotational wormer.