HELP! found some eggs

[lyssareba]

I was out with my dogs when I noticed one of them sniffing at a patch of weeds. When I looked in I found about 13 duck eggs (i know they are duck because we live by a water collection marsh thing) 7 of them were not hatched. I picked them up and brought them inside. Maybe I should have left them, but I figured the mom had abandoned them since she was no where in sight. I also didn't want them to get stepped on and they were cold which means the mom hadn't been on them recently. I have set them up in a box full of towels with a heating mat underneath set at 98. I have never hatched before and have been reading trying to find out if these are even still alive. It is late and they were cold when I picked them up. I tried candling and from what I can tell they are in the last few days of their incubation. They are dark eggs and at least 6 of them have a small light space and a very dark space consuming most of the egg. Any tips, advice, or insight would be great! It would be cool to hatch them Also, this may be stupid question, but since I am new at all this...When I candle them 2 eggs don't move inside when i rotate them while the other 5 look very runny inside. What does that mean?

 

[BantamLover21]

Since the eggs were cold, it is likely that they are dead. But it doesn't hurt to try! 98 degrees is a little cool (99-100 is better), but they should still hatch. The eggs that appear runny probably aren't alive, as most of the time, chicks/ducklings are solid, moving masses in the egg. If I were you, I would incubate for a week or so longer, and then candle again. Posting some photos of the candling might help, too.