This is it next to her offering from the day before - a hefty 75g compared to the miniscule 7g. I wouldn't mind but the poor girl laid another 70g egg later the same day! Bless her, she had a day off today.
I've never had one of these eggs before, but they are not uncommon. Known as wind, fart or witches eggs, they often only contain egg white. I haven't cracked this one yet, so contents unknown!