I am hatching for the first time in my 3rd grade classroom. I tried to hatch 3 eggs originally (in a Brinsea 3-egg Incubator), and one was a yolker, one stopped developing about day 10, and one, well... tomorrow is day 21! When I last candled the egg Friday, I saw no movement, a big dark blob, and lots of blood vessels. From you experienced hatchers out there, do you think it's still viable? It's hard to see it go from doing somersaults on day 14 to nothing on day 19, but it HAS gotten steadily much bigger. Am I being paranoid??