All of my hens have stopped laying. Two have reasonable excuses (one orpington is broody and the other mixed breed is raising baby chicks.) But the other two (different ages, another oprington and mixed breed) have just stopped for no apparent reason. They did lay pretty good through the winter, but now that it's spring, NOTHING for several weeks. Absolutely no signs of molting. The only thing I can think of is that they've all been mostly eating the chick starter/grower I bought for the baby chicks. I can't keep them out of each other's food. The babies are about 5 weeks old. Anything I can do to jumpstart them? Any idea why they've quit?