To be honest I cannot see WHY you would consider dying chicks. The only reason anyone does so is to sell *impulse* chicks at Easter, which will very very likely end up dead in a hurry from neglect/abuse/malnourishment. I am not sure that the in-the egg dying method *harms* them in any way since breeders use the method to "mark" clutches of eggs and such, but the reason it is done around Easter is just disrespectful to the animals and wasteful of life.
*shakes my head* Chicks are gorgeous in their own natural colors...they don't need any "enhancement"