I have a Blue Silkie Bantam that's 5 weeks and 3 days. My question is how old do they have to be to determine sex? I'm hoping it's a girl, but something is telling my a boy. S/hes kinda noisy and loves turning her/his brooder into a dust bath. Not too noisy but stands kinda tall..Has a very very tiny comb....If s/hes not too young ill post pics. Thanks