Identifying chicks once they have hatched?

Please, do not use food coloring or something to that extent on the chicks. A lot of times, if a chick has a different mark (like paint or whatever), it will cause the other chicks to peck at it. Before you know it, they turn cannibalistic. They make bands for you to use to put on their legs. You can find them online, at a farm store, or maybe even at a vet's office. It is so much easier, and you don't have to redo it all the time. Once they get fully feathered (about two or three weeks after hatching), they will probably be easier to tell apart.