I had that problem I had leghorns, production reds, aruacanas and silkies that were old enough to lay but just wern't laying. Then I bought some coronation sussex that were laying and after a couple of days of the sussex laying their first eggs all the rest started laying.
I have some little bantams that wern't laying because I think the bigger hens were bullying them (theres 2 of them) is this possible?
I realy want them to lay so I seperated them from the flock after two days they are still not laying what do I need to do to make them lay or do I just need some...