x317 weeks, your hens are reaching point of lay and they'll all start looking like that over the next 6 weeks or so. That's a hen.
However depending upon where you are the winter cold and shorter daylight hours will play into how soon they will lay.
I try to get my pullets to 20 weeks by July or August latest so they get established in laying before the onset of winter hours otherwise they don't seem to kick in well until spring especially if one of their last juvenile molts occurs at the normal fall molt time.
Hopefully yours won't mind the winter and will set in to laying well soon. Adding lighting to the coop can help to extend the light time to beyond 12 hours each day. (Just don't leave it on all the time or you can cause some egg laying issues and chicken irritability. Also be careful with any lighting...I've burned a coop down and so have several of my friends.)
Lady of McCamley