According to Speckledhen, there is no cure for it. You can puncture and drain fluid via syringe, but you cannot get the egg and shell out. Tkhe fluid keeps building up, and they do not want to eat. Sooner or later it will putrify and maybe even break open inside of her. I have already dug a hole in the woods, but am still hoping for a miracle, that the egg would pass. Speckled hen says this is common enough with hens bred to be layers as longevity is not a goal of the breeding process. I suspect it is to be expected if one does this long enough. Just like having a permanently lame chicken. Now I have had both. My lamie has a good life tho, and is never bullied by the others.