I got some eggs from my inlaws they are all at different stages two had the blood line. one seems maybe 10days another maybe 15-17. Then the rest are either 3-4 days. And there is like 3 eggs that are completely dark and the air pocket is a little bigger then a quarter or so and I see no movement I don't know how many days they are I cannot see at all what should I do? I have now had the eggs for four days and three nights. How do I find out if they are still alive. Or how to know how old they are.