I hatched many duck eggs in my incubator about 5 years ago. After that I had a son and put the incubator up in the attic. There was goose at a local pond. She laid her eggs in the middle of the parking lot. So I kept checking back to make sure she was ok. It had been probably 4 days since my last visit and on the 21st of this month her nest was destroyed. All but one egg. She had abandoned it. So I scooped it up to try and save it. Seeing thats the only thing that could be done. I candled it and it was clear. So on the 21st I put the egg in my incubator at 99.5 degrees and 55 percent humidity and hoped for the best. I have turned it several times a day and sprayed it with water in the mornings. I candled it 4 days ago and saw a little dark spot. Now its day 10. I see a dark spot floating around a little.. and I see a dark liquid matter in the egg.. and I see a pretty good size air sac. The dark spot seems the same size as it was 4 days ago and no blood vessels that I can see. However, my candling light isn't extremely bright. I am wanting to know if this egg might be good? Or if I have to worry about it exploding.. which I read that it could online. Any thoughts?