What’s wrong with this egg?

[Aliviasoko]

One of my bantams laid an abnormally, smaller egg than usual, and when I cracked it open, it was murky and had this little fleshy inside. I do not have a rooster. I read this could be a bacterial infection. Is that what it is or is it just a random happening?

 

[DemeterAD9]

There can be little bits of tissue that come off the reproductive tract and the body thinks it’s a yolk so it adds the albumen (white) and a shell. Often called fairy or fart eggs. Not terribly common but usually nothing to worry about, happens more often in really old and new layers.