Mine was one of the last eggs I gathered it was only three days old when it went into the incubator, my DIS and one shrink wrapped chick that didn’t survive (still don’t t know about the one I oiled before I had to leave...) were among the first of the ones I collected. I remember when candling that there was one with a distinctly more porous shell, looked a bit like #5 in
@Knighstar679 pics, but with my most excellent 7yo helper I neglected to note which egg... though I’m thinking* it was my cup baby. So far I’m at 73% hatch rate though, so I’m fairly happy!