This is my first incubation and I have a couple of questions I was hoping someone could help with.1) If an embryo was to die in the egg would the veins disappear? I'm taking it as long as I can see veins the chick is still viable? 2) A few of my eggs appear much darker on inside than others, but I do see movement...is there a reason these eggs are darker on inside? 3) I didn't know when I put in incubator, but one of my eggs is a double yolk. I know the outcome for these is not good and it will prob not make it. On day 9 and I still see movement. Is it possible that one of the chicks may make it to hatch? I cannot bring myself to toss it as long as I see movement inside. Thanks for any help!