Does anyone mix their own feed and feed a whole grain feed instead of lay mash or crumble? Is it better nutritionally? Also are there benefits to feeding a soy and corn free diet? Also, I found this link and was wondering if this is a good balance, minus the corn. What type of grit do you feed your chickens? http://www.gardenbetty.com/2012/06/garden-bettys-homemade-whole-grain-chicken-feed/ Thanks guys!!