As suspected.... I believe I have had an unsuccessful first attempt at incubating! I am at day 31 of what should have been a 28 day hatch (power outage for over 24 hrs late hatch).
I returned home last night from 2 days away for work to no news. Candled today and I can see one definite bad egg. Two of the other have gone visibly grey and patchy on the outside and the other one has nothing but darkness and an air sac with no sign of anything.
I may eggtopsy.. I just need to build up the nerve!
This one could be something if you have a power outage or your thermometer is off on the cool side. Tap it and listen or put some 100 degree water in a bowl and "float test" it to see if it moves.