I have an assortment of 8 week old leghorn, welsummer, americana, golden comet, buff brahma, rhode red, barred rock, and speckled sussex. I am picking them up soon and I have a few questions: What is the best brand and type of feed available for them to eat? Should I be supplying grit at this age? How much food grade diatomaceous earth should I be putting in their food? Are there any other supplements I should pick up to give them? Should I keep their food and water in their coop or in their pen that is attached to the coop? ( I have a 5 gallon bucket waterer and PVC feeder) Thanks!