Rigobert KUMBOHi Rigobert,Fat will decrease fines and act as lubricant reducing the energy required for the process, and increasing the life span of the pelletizing die. However, too much fat in the mixer will cause mealy pellets (lower durability -soft-). Therefore adding fat (coating) after pelleting helps to solve this issue, and you will have a more durable pellet compared with the pellet you ...