Thank you… is it any different as this is a duck egg and incubation period longer? I think those pics are for chicken eggs but maybe concept is the same?! I don’t have the heart to discard so will keep it under broody for another week or so!
Struggling to get a half decent pic - sorry! No veins but a flickering when I candle - but looks like black gunk inside which moves like jelly. Which could explain flickering? Doesn’t smell. Quitter or hold for now?