Is there a way to "mark" eggs?

[chickenmommy25]

Hi all! I have a sick girl and the dr says we can't eat her eggs for a month after her medicine is done. Is there a way to mark her eggs? I was thinking food coloring around her vent.
Would that work?

What do you all think?

 

[silkiecuddles]

I don't think so. The best thing to do would be to confine her for that period of time, but you may not be have the room or means to.
What breed are your hens? Some chickens I can tell their eggs apart, which is handy in cases like this

 

[keesmom]

Food coloring in the vent will work. I have not done it so I do not know how often you need to reapply the dye.