We are devastated! We have 23 hens, 11 Buff Orpingtons, 12 Plymouth White Rocks. They were born around the 17th of May 2010. Egg laying started between the end of October-November. We were getting anywhere between 12 to 18 eggs a night. Then last week, I only got 2 one day. So I figured I'd get a ton the next day. Only two again. I have egg eaters and with so many birds I don't know how to determine which ones they are. Diet is not the problem as they have tremendous amount of feed, grit, oyster shell, water and treats daily. What would cause them to start. I had a few soft shell messy eggs back in October/November when they started laying, but why now? Are any breeds less likely to do this than others? What did we do wrong? We have tried mustard in eggs, golf balls, etc., etc. to try to break this and it just started in the last few days. We can't stay in the hen house and building another nesting box configuration is out of the question. We hesitate to get more chickens until we find out what we did wrong this time. I think we are going to plant real eggs in the nesting boxes and watch for the predatory chickens and separate them out and destroy them. I just don't want to get rid of all my chickens but we can't keep feeding and housing these chickens that are eating all their eggs. HELP please. I am truly devastated.