I've had my chicks for a week, and i can't tell them apart at all. I have six, 4 week-old, buff orpingtons, and they all look exactly the same. My only problem with that is that i would like to, you know, look them over from time to time to make sure i notice if something's going wrong, but since i can't tell them apart, i never know who i've already checked out. Anybody have a way to mark them that is simple but won't hurt them? I did of course consider toe-nail polish and then realized they would probably peck each others' toes bloody.