Other grains to look for are
quinoa (there are three colors of
quinoa available), amaranth, buckwheat (not related to wheat at all) and hulled millet. Yes, millet is what birds eat, but the hulled millet found in the bulk foods department is meant for human consumption. If you can find a clean source that isn't too dusty, millet is good, too. I have found quinoa (pronounced keen-wah) to be very clean, plus it is higher in protein than the other grains. And, it's not from a grass.