One of my pekin girls has been laying soft shelled eggs for several weeks now. Before this they were very rare between the two girls i have. Shes 15 months old, so not a new layer. They have been on purina layena since POL, with free choice oyster shell at all times. We have had her since she was about 5 days old. She appears healthy and happy, no behavior changes ir change in diet. Some are so fragile the fall apart when trying to clean up, some are leathery. Im at a loss at what, if anything i should or can do for her. Our other hen is laying like clock work as usual. Any advice would be greatly appreciated!!! Thank you in advance! Let me know if any pertinant info was forgotten.