Based on the guarantee of other nutrients, adding 8% of sand to the compound feed is the best. The chicken has the strongest appetite, the best mental and physical condition, and the highest egg production rate. When the sand is below 8%, the chicken's egg production rate does not increase significantly. When the sand is more than 8%, the chicken's egg production rate decreases. This shows that the higher the proportion of sand, the lower the egg production and the bad mental state. Dried Sweet Potatoes,Dehydrated Green Onions,Dried Spinach Flakes,Dehydrated Chinese Cabbage Taizhou BEST Imp.and Exp.trade Co., Ltd. , https://www.xinshuyufood.com