I was given some wheat, some of which is about 20 years old, so I know its ok. This other stuff looks like its from the 70's or even earlier. Some is in sealed 1 gallon cans and some is in plastic buckets(when did they start storing in plastic buckets?). I didn't know for sure the storage conditions, but the older stuff came from a cat ladys house and the outside of the containers smell like kitty pee although the stuff inside smells and looks fine. So what to do with this? Throw it out, feed it to the chickens, save it for when we totally run out of everything or to give to zombies?