Any clues what would cause a good layer to suddenly start laying shell less eggs? One of my SLW has laid a shell less egg 2 days in a row now. I haven't changed anything, they always have access to oyster shell and she doesn't seem to be acting any different or like anything is wrong. Here is the one from today, very odd looking. This was after I scooped it out of the nest box. The yolk had been completely in tact but sitting outside the membrane. I just ended up breaking it trying to scoop it up.