My Sapphires were easily sexed at 4 weeks old based on the size of the comb. Cockerels had a visibly larger comb than the pullets. Mine are now 6 weeks old and are super easy to tell the one cockerel that I have left from all the pullets.
Good to know!! My sapphires are 4.5 weeks now and none have any color or growth in their little combs. I hope your experience holds true
