My three chicks are getting close to three weeks old. Two are developing at about the same level but the third, Shania, has a larger comb than the other two. Distinctly larger. They are all EE's, sexed as female. When will I be able to tell for sure if MPC was right shy of a cockodoodle or egg? Shania -What you can't see very well in these is the height of the comb. She's got about a millimeter or two on her sisters who are still completely flat. Her sister Scrambles **I should probably relist this under Gender, but I'm not sure how.