Hi there. I have 2 silver laced wyandottes, 1 buff orpington and 1 easter egger. They are all the same age. Born April 1st. So that makes them roughly almost 21 weeks old. ONLY 1 of the silver laced wyandotte's have started laying and that was three weeks ago. No else is. They are eating Dumor food for their age range. Is there something wrong? Am I not doing something right? Please help. J.