We have 5 six day old chicks in a brooder. They're eating their medicated chick feed, and drinking well. We offered them yogurt, which they ignored- until I sprinkled it with a bit of ground oatmeal. They gobbled it up. We used to give our older chickens treats of bread, veggie peels, etc. But I'm not sure at what age they can handle such treats. At what age do you start giving your chicks other food- and what do you give them?