I had 8 Blue slate eggs in an incubator, seemingly doing fine two weeks ago. They had lost the proper amount of weight and the air sac was looking good. They should have hatched on Monday, early this morning I carefully candled the eggs and found 4 obvious duds and 4 that look like they have poults and should have hatched. Giving them until Sat am before I do a post, out of pure optimism. I lowered the temp a bit to 98.5-99 and raised the humidity to around 60-65% (the best I can get in this incubator) at day 25, which was what I've been told I need to do with turkey eggs. And still it looks like fully developed eggs have failed to hatch again. I've had lots of failures, but most were shipped eggs, these were laid here and carefully stored prior to incubation. I do have 8 other eggs in a newer Brinsea, due to hatch in 3 weeks - but seemingly everything was going well for at least half these eggs until the very end. Any ideas??? I sure don't want this next 8 to meet a similar fate.