I am going to do the test, the old timers that say round eggs are hens, and pointy eggs are roosters, I did it with some guinea eggs I was hatching I put chicken eggs in with them, I thought I had all round brown, and had 10, and 8 hatched.. they all seem to look like hens to me but they are all hatched on the 4th of august. I am going to set some more today, I have a bunch of round eggs and I am going to do the test!!!!!! Just thought it would be fun, my DH is relaxing on letting me hatch, since we have hatched 3 rounds of guineas!!! Gee...I have about 50 now!!!! 3 different stages! so..... I am putting everything in, including the black polish and the white sultan!! these are my latest chicks, and guinea keets....the only one I hope is a rooster is the polish! My polish rooster is mean and old....!!!! and this is my big birdcage we got at a sale for $15.00!!! DH doesn't mind it in the house!!!!