In the packaging process, during the batch production interval of different pet food, the production line will perform a thorough production line cleaning to prevent the mixing of food from different production batches, but there is still a small chance that dry food from different product lines will be mixed. The original factory guarantees that all processes in the grain bagging process are strictly implemented in accordance with the standards. Based on the characteristics of the bagging machinery and equipment, it is impossible to guarantee the complete isolation of the production line, but there is no safety problem for all dry grains.