I have been hatching chicks from eggs for about a year now, and have owned chickens for over a decade. But, today when candling one of my 13 new eggs, named after the states, one of them showed an unusual dark spot near the surface, and although I’m pretty sure it’s a dud, I really need a second opinion. I do not want to risk the safety of the other eggs and future ones living in the incubator as well. I will attach a picture below. 
