@Shezbug Holy Potatoes! That is a big egg
My hen Silvermoon started laying shell-less eggs in her later years. The membrane was still tough enough to hold the yolk and everything together. It was a weird jelly ball egg, we didn't eat those- probably could have though. I personally haven't had wrinkle eggs, but I agree with the pocketfarm blog that
@Mockinbirdiva posted. Especially since it is such a big egg.