Skullcap is an effective central nervous system depressant. Dosages are three to eight cc twice daily per 100 pounds of weight. Use 0.5 to 1.5 oz. for large herbivores Oral dosages as given are for carnivores by body weight. It is advised to dose low initially and adjust upwards as the circumstances direct. 2. Do not scale up dosages for large herbivores by their weight! Large herbivores, such as cattle or horses, usually require approximately twice the dosage of a 200 lb. carnivore.