Why would you suggest this?! He gets a bad bag of feed so you recommend he just waste his money going forward with Mazuri?! Sorry but IMHO this is just bad advice.
To the OP, if it were me, I would return the feed and get a new bag. Make sure you keep it in an air tight container to keep the moisture and the bugs out.
I buy my hog feed 500 lbs at a time, and I have only had to return 3 bags so far.