feather sexing

[penelop93]

hi everyone,

yesterday i bought four beautiful chicks 2 buff/lemon pekins 1 sebright and 1 silkie all bantams. my silkie and sebright have obviously longer feathers than the primary feathers so they look like girls but the two pekings both have small feathers. is this the bread or am i unlucky enough to have two male pekins? they're all around 1 week old so the age does vary slightly.

thanks in advance