3.Pelleting: After grinding, you should put the cow dung fine power into the pellet machine, then the pellet machine can compress the cow dung into pellets. 4.Cooling: Cow dung pellets from pellet machine are with high moisture content and high temperature degree, therefore cooling machine is necessary to low down material temperature to 3-5℃ higher than room temperature and is important for safely stored or transported in case the mildew.