I read a lot of posts here from people who are concerned about soft shelled eggs. I have just the opposite problem. We have 23 BO hens and 2 BO roosters. It seems like all the hens are laying since we get 18 to 2 eggs per day. The only "problem" if it is a problem is that the shells are very thick and hard and the inner membrane makes breaking and egg (like for an omelet or something) a real chore. Once the shell is cracked, it actually takes a knife to cut the membrane, otherwise the shell breaks into small pieces before the membrane can be torn open. I think, (although nobody has actually fessed up) that it is the reason we can't really sell more eggs. Could it be the diet? We feed them 16% layer crumbles (and have recently started phasing in layer pellets) and have both grit and oyster shells available at all times. They go out in the 300 sq. ft. pen every day and dutifully return to the coop every eventing 10 minutes after sunset. We throw in grass and weed clippings often and occasionally add some breadcrumbs. They are fantastically funny and docile chickens and we could ask for better behaved birds. The roosters are doing their thing as well. The only problem is the thick shells and membranes. Is this actually a problem? Does it need correcting and, if so, what?