Have you candled the two unhatched eggs, lately? There are lots of pictures here on BYC that show what candling should reveal, almost day by day. If the inside "lights up," you'll know if development stopped before the chick fully developed. If it's mostly dark, you may have a chick in there, still. I would also wait until day 25 before thinking about discarding, especially if your temps ever fluctuated a bit low or there was a power loss at any point.
Regardless of what happens with the last two, you still have two healthy chicks - and that little miracle never gets old!
Good Luck!
Regardless of what happens with the last two, you still have two healthy chicks - and that little miracle never gets old!
Good Luck!