Are you SERIOUS, maplesky? That is an excellent tip. I'm off to look at the backs of things. Because I'm just dying to spend more time on all this. Sigh.
I agree with the freezing. When I had a lot of house birds, i.e.: Senegals, Parakeets, Cockatiels, etc... we had these moths everywhere.
I froze all new food coming in at least three days, and then vaccuum packed the bulk extra. It took us about 4 weeks, but we finally got them under control.