Awwww theses chicks are so very cute. Ive...well my two Light Sussex sisters have just hatched 15 Pekin, cross pekin, cross sussex-silkie chicks. They are little beauties but am having trouble sexing...this is my forst time so any advice would be brill. I kinda know the basic's on what to look for example big comb,sickle feathers....but at 3wks old what defines the roos from the pullets???