The problem of pig feed granulation

How much moisture is controlled when we make granular materials? our company's moisture content is controlled within 12%. It gets moldy very quickly (about 50 days). Is it the cause of uneven moisture? pig feed, I think no more than 13% moisture will not mildew. Mildew may be caused by inadequate cooling. It is not representative when sampling. So you tested it to be mildew within 12%. There are many reasons.