I have mixed whole grain feed for my chickens as per a recipe, but I worry that I am not giving them a complete feed-one that contains all the vitamins and minerals necessary. They LOVED what I made them and I did find that by weight they eat less and wasted nothing! They do free range, but I remember when selecting my chickens some were listed as good foragers and some content with confinement (makes me wonder if their foraging skills are less than the others). So even with free ranging I wonder if they are getting everything they need -making a complete diet all the more necessary. I could be totally over worried, but after reading some of these forums it sounds like rocket science at times!