Your all now being dismissive. The issue exists. My wife and I eat approximately 120 eggs every 4 weeks out of that batch, approximately 2 will smell like chicken poop when cracked opened after soft boiling
So it's now 2021, and came here out of curiosity as the farm eggs I get have the very same issue. About 2 out of 120 will have a very distinct chicken poop smell when you crack them open. It's the egg NOT the shell. My wife and I soft boil 2 each every day for breakfast. We both have experience it.
Your all wrong being dismissive. It's after the egg is soft boiled and cracked open, about 2 eggs out of 120 will have a distinct chicken shit smell. I came here cause I was curious. Yes farm eggs tend to have a slightly different odor. This is different.