In the processing of pet feed, the main components of pet feed are generally composed of cereal flour (such as wheat flour) and high protein animal powders, meats and fats with higher protein content.In the process of dry pet feed processing, when the content of fresh meat is as high as 20% to 30%, it needs to be strongly mixed and kneaded when extruding. This can only be accomplished by atwin-screw extruder.Because the twin screws knead and squeeze each other, they will not stick together and affect the operation of the machine even when the raw material is high in grease.