I want to open a cattle feed factory. Where can I buy feed ingredients?

When there are raw materials in the veterinary drug market, basically you have to find an expert to make a formula when there is enough single raw material, and you have to experiment whether this formula is feasible. Anyway, it's quite troublesome. However, you can consult the technical experts of Shanghai Feifei. They have a lot of core materials, which can also be said to be a row of formulas, so you only need to buy the core materials and mix them according to the formulas to start production.