I have been thinking about mixing my chickens' feed myself, in order to get away from GMO garbage in the feed. We grow some great southern peas in this area of the country, and I know I can substitute southern peas for GMO soybeans in basic chicken feed recipes for protein. But what can I use to substitute for GMO corn as a carbohydrate? I have been told that milo aka grain sorghum will work, but I can't find anybody who sells it around here -- and I'm in West Tennessee, which used to be the area of the country that grew the most grain sorghum in the US. What else can be used as a carb in the chicken feed formula?