You did get gipped, but since you certainly don't want another bag of the same, do what was suggested and put the bag in the freezer to kill the bugs and let them have it. I'd certainly take pics and complain to them, though! Shipped feed is sure harder to deal with returning. I always take back buggy feed. Every bag I get has a cup or two of food grade DE added to it so that if any bugs get in there, they won't live long, but to buy feed that is old and vitamin-depleted is a gip.