do silkies tend to start laying later than 'layer' breeds? I've got a white silkie that's getting to be around the 18wk mark and i'm just wondering if I should open the nest boxes back up. they all got in the habit of sleeping/roosting in them so i went ahead and forced them to find a different place to do that. I just don't want to have to search the run for eggs, or worse, be leaving treats for some kind of egg-eating vermin.