Day 15 for Coturnix.
Candled and locked down my 24 today. Only one didn't develop at all, the rest looked good. As I've mentioned, I had one male that was pretty badly beaten up by another before I separated the bully out. I was surprised that he survived, but he's been in with two hens all along. The first time I tried to hatch any of their eggs, none were fertilized. The good news is that he's figured it out because all 6 eggs from that group are developing great.
ETA: When I opened the non starter, it appeared as if the yolk was broken. I don't think I nicked it with the egg scissors. These were my own eggs. Is it normal for the yolk to break, or is that why it didn't develop?