Rural Gardening: Am I a boy or girl?, 1 by Eufaula

Eufaula wrote:
Here are my 4 Silkies! They arrived today, which was sad for me , but it helped to take my mind off losing my little Serama!
Anyway the Little boy that raised these had soooooo many to choose from! He picked out the ones with Top knots for me but forgot that I wanted beards too! Oh well , he only wanted $5.00 a piece for them so Im happy!
Now My questionis this... I like them even love the cute little critters but have no knowledge of them at all. Why do some have Blue faces ( girls) and one (the roo) a red face??