... chief components are proteinase, amylase,β-glucanase ,etc ,and many kinds of vitamins.Advantages:1. The ... replenish digestive ferments for shortage in young animal, and improve digestibility of protein, starch, etc.2. ... It can decompose cellulose and improve digestibility of all nutrient matter.3. It ... improve the quality of meat, egg and milk.6. It can improve the animal disease-resistance ...