When and how will I be able to tell the different between my Hens & Roos. 10 chicks 4 weeks old. I should have gotten 10 altogether but Ideal sent me 11. I order 7 pullet, 1male White Rocks. Then 2 Cochin Bantan st runs. One pass on to the big coop in the sky. Question 2- When will they start laying eggs?