Australorp bantam egg: 25 gms.
4th egg for MyShell, black 4.5 month old pullet.
First 3 were clean. This one has small amount of droppings on it (nothing unusual) and this streak of blood.
I had similar from one of my hens when they came back on the lay. Someone told me that sometimes they can burst a little capilliary. I kept an eye out but it never happened again.