Button quail have stop laying eggs...

Hello hello all and thank you in advance for anyone who might be able to help me figure out why my button quail have stopped laying eggs.
So heres the details,
My roommate and i are both culinary students who decided to raise i couple of quail for their eggs. We have had them for about 4 months and got them as 2 week old chicks. We have a heat lamp to help keep them a good temp and have been feeding them gamebird starter and occasionally meal worms and left over greenery(sprouts and lettuce). We give them fresh water 2 times a day and even give them a cacium suppliment for the h2o as well for whenever they lay eggs. So we were getting 2-3 eggs daily for the past month and a half or so, but for the past week possibly more, we havent gotten any eggs at all. THe quail are looking pretty chubby and i am concerned.
Any help would be most appreciated...

Thanks.