Please forgive me -- I'm a southern city boy who was raised on grits, not oatmeal. A friend has given me a sack of whole oats. How do I feed this to my chickens? Do I have to grind it up, or can I feed it to them as is? Do I have to cook it? Do I have to "roll" it? What is the difference between whole oats and "rolled" oats, anyway? I'm just looking at the stuff, and wondering what to do with it.