My silkie hen and incubator hatched out 14 of 28 calico Cochin eggs and mama did a great job raising the chicks. Now I need help sexing. The chicks are now 56 days old (8 wks) It is my thought that at this age the growing Roos have larger and redder combs and wattels. Am I correct? In the second pic the blue marked chick has tried to crow and the one next to him on his left I Marked pink -I think is a boy and is marked pink cause it loves my attention. You can barely see the pink. Am I correct that The combs and wattels grow faster and redder in developing Roos? Is this a dependable way to sex young Cochins?