For a while one of my girls was not laying any eggs except for several "wind eggs", now she seems to be laying mainly soft eggs. Also one morning I let them out and she fluffed herself up, had a drink and then stood away from the others refusing to eat anything - when I went out later there was an egg with no yolk, only a little white and a shell like jelly, if that can be classed as an egg.I can't be sure it was all her but that is my guess. I have 4 hens, all hybrids.