I'm still pondering how to go about marking my keets (when I get them!) to be able to tell them apart. Marking their little heads with food coloring seems simple enough, except there aren't 10-12 colors! Not too sure about using permanent markers on those sweet baby heads! Aren't those possibly toxic? I'm skeptical about using colored zip ties or cable ties on their tender little baby legs. I DON'T want to hurt or damage their legs or skin. Would something like embroidery thread be okay to use? Or would that be a choking hazard if they happened to peck the string loose? Geeze! I'm not even a 'guinea-mom' yet and I'm getting gray hair with worry!