EMU eggs. I have 9 eggs incubating from day 10 to day 40. The past few days #1 is at 40 and has had a slight smell when I do the sniff test for the past 3 days. Similar to a possible rotten egg. I have done the “cool down” test and it was about 3.5 degrees warmer on the pointy end.
#8 who is on day 10 has a slightly fishy smell on the pointy end. None of the other seem to have a smell.