My silkie hen won't lay!!

[zachman15]

I have a silkie hen that should be mature enough to lay eggs I got her back in October of 2014. She lives with 2 roosters who can from the same batch of eggs. I think she isn't laying because she is to small is this possible for hens not being able to lay because they are to small.

I know the pics don't show much :/These are the only pics I have of her she is the small white one

 

[1muttsfan]

How old is she? It is not unusual for Silkies to take quite a while to start laying.