We have 5 layers of various breeds that are about 2.5 years old. Our best layer, Penny, a red star, has been laying increasingly bad eggs in terms of shell quality for the past 6 months. She continues to lay a large brown egg every day but over the past 3 months the shells are so thin and wrinkled they crack as she lays then. We feed a high quality organic feed (Modesto Milling soy-free layer pellets) and about 3 months ago added oyster shell, prior to that we were crushing egg shells and giving that free choice for the whole lives. All other hens shells are great. To complicate things about a month ago she injured herself while on pasture and appears to have broken her leg or hip. She is improving and is now able to bear weight but limps. She is one of our original 4 hens and we are fairly attached. We were planning on allowing this original group to grow old and live long lives since they're our first. Her cracked eggs are soiling the nest box and teaching our new pullets to eat eggs, which would be a death sentence for them all if they were to develop a taste. We are going to process meat birds in 2-4 wks and are wondering if we should cull her too but are torn because we like her. Any ideas if there is something we should be doing that could help this? The oyster shells didn't seem to make a difference. What would you guys do? If she would stop laying I would love to keep her but I don't know of any way to make that happen.