All the others, lay very thick shelled eggs. Almost diffucult to crack. I have free choice oyster shell, I mix in their shells into treats, and I have mixed some oyster shell into the crumbles and pellets. I've also put vinegar in the water, and I'm fairly certain it's one girl. This is the fifth one, including a completely shellless egg. They are translucent almost, very thin, and white shells, and I have all brown egg layers. Often there is some shell or calcium deposits on one end, like brown dots or white crusted dots. Is she broken, lol? But seriously, is this just her, should I cull her? I'm 99% certain it's my smallest girl, and she is very skittish, and is picked on the most. She's a Rhode Island Red/White rock cross from Moyers, and is the very lightest of all of them. (we call her blondie). Any other things I haven't done?