Bugs Bugs Everywhere!

I opened a bucket of wheat this week only to find numerous exoskeletons among the grains. (Insert curse words here). Now, I had bought this sack of wheat a while ago and hadn't been rotating it as I normally would due to the whole pregnancy/baby thing. But it was still so disconcerting to see bugs in my food storage!

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I have found bugs before in store-bought oats and rice but never in cannery wheat. I take care of the bugs in oats/rice by sticking the package in the freezer for 3 days right when I bring it home from the store. But what do you do for a 25 lb sack of wheat?

Has anyone had this happen to them? What do you do to prevent pests in the wheat? (Besides proper rotation of course). One google search led to a comment somewhere along the lines of "well at least you know there were no insecticides used while growing this food."

What are your thoughts? Are bugs added protein? Or nasty pests? What can I do to prevent this from happening again?