My worst layer is my 10-month-old RIR. She started out great, and laid almost every day for about 3 months. Then practically nothing. Over the winter I got a couple of doulbe-shelled eggs, shell-less eggs, and misshapen eggs. But mostly nothing, day after day. She hasn't laid in weeks, although I get about 2 eggs a day from the other three hens. On the rare occasion when I do get an egg from the RIR, it's usually small, pale, and thin-shelled. What could be wrong with my her? She looks great and acts perfectly healthy.