I am interested in mixing my own chicken feed. I want complete nutrition, it does NOT have to be organic, soy-free, or meat free. I understand that scratch grains are not complete nutrition for chickens. However, the ingredients in scratch are also the main ingredients in homemade and processed feed: Corn, wheat, barley, milo, millet, BOSS. This has me thinking, what do I need to add to turn chicken scratch into a complete feed? It seems that the only things missing from scratch are more protein (from meat products or from grains such as soybeans, peas, or lentils) and nutrients (from kelp granules and brewers yeast). I could mix something up for pretty cheap using scratch and wild bird food as a base. Any thoughts/ideas/suggestions are greatly appreciated.