At present, the compound feed for experimental animals in China is mainly treated by 60Co-γ-ray irradiation sterilization or high-pressure steam sterilization. According to relevant research reports, whether 60Co-γ ray irradiation sterilization or high-pressure steam sterilization have caused some damage to some nutritional components in compound feed. When designing related feed nutrition formulas, our company will compensate and add according to the corresponding loss of sterilization to ensure that the final nutritional content of the compound feed is sufficient.