I have 4 Barred Rocks, 3 White Rocks, and 2 Reds. The Barred are molting. I don't know who lays which eggs but have found the remains of an egg or two on several occasions but no shell fragments. Yesterday I got an egg with an extremely soft shell--actually more like a water balloon that an egg--with what resembled an umbilical cord attached. I have no rooster. Is this normal? Could they be laying eggs with little or no shell as they emerge from molt?