One possible safe ferret dye is Kool-Aid, which I have used on kid's hair. Take Kool-Aid powder concentrate (the kind with no sugar) and mix it with SOME water (not the full amount) and paint it on with a brush. It washes out fairly easily after the event. However, children don't LICK it off, and I don't know how problematic concentrated dye chemicals might be to a ferret! Just a thought. - Erika [Posted in FML issue 2841]