We have used Sumo in our feeding program and have experienced really great results off the product. However, our most recent barrow seems to be experiencing some slight colic after we tried to get him on Sumo. We cleared the colic up with some probiotics and got him back on feed but he still doesn't clean up his feed when we add in the Sumo. In curiosity I went and looked to see if I could find an expiration date on our bag of Sumo and could only see a date beside the acronym REV. Does anyone actually know what REV means?

I would call the feed mill and ask if they can help you with the milling date.