I set 3 Duck Eggs in the incubator on Sept 28, 2010 and this past last couple days I noticecd that two of the eggs turned gray in color. What should I do? They do have a fishy smell to them but the other white one does not smell?? Is this bad news? They are at about 35 to 50% humitidy and 99.5 temp. Spray them down once a day.