Weird duck egg

[dunkinmoby]

My Buff duck usually lays 3-4 light blue/green eggs per week. She hadn't laid an egg in about 4 days and then THIS. Does anyone know what could have caused an egg like this?
(See photo attached)

 

[chickens really]

That's a meat spot....It happens.....

 

[dunkinmoby]

Why the crazy color to the shell as well as the meat spot? Is there something wrong with my duck?

 

[chickens really]

No...Nothing is wrong with your Duck...Just a glitch in the egg making process....