In the search for alternatives, the industry, on a massive scale, has reverted to plant-based alternatives like soy, industrial chicken waste, blood meal from slaughterhouses and so on.
关于替代品的寻找， 在很大程度上， 已经恢复到以植物为基础的替代品， 比如大豆，产业鸡粪， 来自屠宰场的血粉 等等。