mine hen is bigger then the rest it just depends on the parents ... if you look on my profile i have silkie pics a person that is good to ask is aoxa i got my silkies from her and they are great and i love them i am getting a frilkie from her tothis doesnt happen till they are about 4 months old
you can determine gender by size...cockerels tend to be bigger than the pullets post pics and might be able to tell you their gender. need comb shots and body shots and a group shot