I'm looking for some sort of list of foods that are good for the chickens? I've read that they cannot have rhubarb, green potatoes, or avocado. Is that really all they can't eat? I've also read that oatmeal is ok, but (please don't laugh too hard at this) I've never cooked it before. Is it cooked with half water and half oatmeal or does it need more water? lol! Thank you in advance for your replies!