I have found that all problems relating to the chickens can be cured in a week or less if you keep the communication lines open. I had a broken egg shells in the nest every day for about 4 days. The innocent hens were hiding their eggs in the corners and burying them under the wood shavings to save them for me. After I had a serious talking to with the whole flock and told them that I didnt need to know who was doing it I just needed them to stop it- today, well they did. So none of them ratted on anyone but I havent had a broken egg since.Don't believe it. You don't have to make up ways to make them stop...just wait awhile and it goes away like magic. Right about the time egg shells firm up again....
Lisa