Give us a little more info... Are they free ranging? If so, you will have to go on an easter egg hunt. They love to find an out of the way place to lay! Do they have nesting boxes? If so, you might put a golf ball in each nest, to help them get the idea. Are you feeding layer pellets? Do they have plenty of fresh water? Do the birds appear healthy? If you only have 1 rooster, then you should have 39 hens- which means eggs will be coming.