In this study, on the basis of invigorating vital energy and enriching the blood, the three different Chinese herbal medicine prescriptions were organized with Astragalus, Epimedium, atrctylodis macrocephalae, Raidix Ophiopogonis and so on. These three prescriptions all had the effect of immune enhancement. In order to determine the effect of the prescriptions on the immune enhancement of the chickens at high, middle, and low doses, 500 seven-day-old chickens were randomly divided into ten groups, 5...