yeeeess they do...OMG I found a tiny tiny egg on the floor today in studio. So i looked it up online and that is the only thing I can think of that has been in my studio and that lays eggs with a shell. mmmm. Not on my diet...I did go to grocery store today, PriceRight, like a BJ's. Bought some ceviche, wine and almonds. What else do I need? Balanced diet...right...right. But having spinach pesto with linguine tonight.