I have read the posts regarding egg fertility. To me, this looks more like a "bullseye" than the blastodisk. I have put a couple batches of these eggs in the incubator and by day 7 I see no growth. To rule out that it's not an incubator (or incubator operator) issue, I have also put eggs from different roosters in the incubator and a large majority of them show growth by day 7. Any input or advice would be appreciated!