I candled the eggs a few days ago, all of the duck eggs looked great and I could see alot of movement. I candled them again tonight, I still see veins but some are hard to see anything I'm guessing because the duck is getting bigger and taking up more space. But....I also notices several small dark spot forming inside the eggs that do not have movement, maybe the ducky is just pooping already??? (so I am telling myself) I did see a couple that were still moving actively, but the majority of them look as if they all have the same dark spots inside scattered around. Should I wait? Should I throw them out, do I risk it spreading to the other eggs? Are they already contaminated?