They are Free range. We raised them with a ceramic egg, so they have every opportunity to peck it. We tried hot sauce. We tried paint. Caught and disposed of one hen. We have added dog and cat food for protein. We have given them oyster shell. Now we are trying solitary cages to see who is eating their own egg. Planning on an egg catching system and curtains in the boxes. I think it is more behavioral than dietary. What do we try next? Supper?