On day 2. Trying to see the "blood island" forming, but only seeing a dark blob at the top of the shell (when I hold it upright) it moves a little bit. Is it dead? What does this mean?
I wouldn't try to determine if any are 'dead' or not viable until day 7 at the earliest. Because some are slow to form, And if you aren't sure what you are looking for you may toss out several viable eggs.