So I'm getting ready to hatch eggs, and I need to know the exact cross of the chicks. Obviously I have to mark them some how, and I'd like something permanent. Has anyone here ever toe-punched their chicks? If so... Does it hurt them? I'm a real softie for baby chicks, and I don't want to cause them too much pain. Do they bleed? And, what do you use to punch the holes? I know there are fancy tools, but if a household item works just as well, I'd rather use that than buy something. Thanks!