MEAT DUCK FATTENING FORMULA: Yam, ophiopogon japonicus, licorice 20 grams each, Poria Cocos, astragalus membranaceus 25 grams each, Shouwu, Dangshen 23 grams each, Angelica, Chuanxiong 10 grams each, Liuyi powder, multi-vitamin 30 grams each, fish meal, soybean 500 grams each. The above medicine is mixed and crushed, and mixed into the feed, which can be used for fattening 30 meat ducks.