I have a crazy story for you. Last September I was at a swap meet, and a man offered me a dozen eggs from his flock for free just to get rid of them. I remembered buying eggs from someone with their own flock some years back, and when I went to make an omelet, dead embryos fell into my pan. Three of the 12 eggs were that way, and I did not eat omelets for a while after that.
Anyway, when he gave me the swap meet eggs, I remembered this and candled them. Some were developing. I came to this forum in a panic wanting to know how to hatch them, and some did grow, but none lived to hatch. Been here ever since. Now I have a little flock and will try to hatch some of their eggs. Sometimes a small thing in your life can set a lot of things into motion.
No eggs yet this morning, so I added an 8th and started up the incubator.