Daily diet affects the size of egg as well as being a pullet. I think her egg will get bigger as she learns what she is doing. (and more uniform in size). I got an egg that I think is from a FBCM, I got it on a day that her "normal" egg was not there. It is much lighter in color (darker than the...
Outside of fertility issues, wouldn't the bird from a smaller egg remain smaller when grown? I can hardly wait for my black ausies to be old enuf for me to set their eggs (should lay their first eggs the end this month)