Just about every hen I have ever had started out with a "fart egg". However I have almost never had one come out yolkless. They are either miniaturized throughout (tiny yolks) or with a normal sized yolk and almost no albumen ('white').Fart egg , fairy egg is when they lay an abnormal small egg. Sometimes it just has the whites other times its normal inside but very tiny.
I remember when I got my frst group of Easter Eggers. All while they were growing I was telling my housemates that they were 'AmERicanas' (pronounced as written), I never used the term Easter Egger, let alone mentioned what color egg they layed. When Muffins produced her first beautifully intensely colored medium green egg the look in their eyes was all I could have hoped for!