I asked this question or similar recently and got no response, so wanted to try again. I have one hen who has been dropping soft-shelled, mis-formed eggs from her roost at night -- I find them in a puddle under the roost in the morning when I open the coop. Another of the hens has done the same just one time in last month. The main hen Lucy has done this from time to time in last year and has been doing it very frequently in the past month, every other day this past week, with a normal egg on other days -- though her eggs were looking very light colored and pimply a month ago. I know the need for calcium in their diet and they get lay crumbles with extra oyster shell as their main feed, a few other things like game bird crumbles with higher protein which I give when they get sort of molty, laying pellets, rooster mix, sunflower chips, veggies (tomatoes, blueberries, lots of greens) and I tend to give them a little non-fat cottage cheese, yogurt or other low fat/low sodium cheese most evenings, along with meal worms (both live and dried). My cleaning women from Guatemala today mentioned she thought they needed iron. I talked to my feed store and they said they'd never heard of their chicken people using iron and just thought I needed to add even more oyster shell to their food. Should I stop feeding them anything but their layiing crumbles with oyster shell and just throw in extra oyster shell? Or keep feeding some stuff and leave out other? Am I giving them too much calcium with the little bit of cheese-yogurt at night? Any advice or ideas would be greatly appreciated. Thanks!