On day 17. Now down to 16 good eggs out of the original 24 (25th was broken accidentally). I found 2 more bad ones that were beginning to smell and removed them. Last night around 6:00 PM I discovered the first external pip. I have 6 total this morning with external pips. None have hatched yet, but I assume it is at least 24 hours from external pip to zip? It should be interesting seeing what happens tonight. I do hope I end up with at least 10 or 12 healthy chicks. I may order another batch of quail eggs depending upon how many hatch out and also if the weather for shipping cools off a bit, since it is so hot in the eastern US right now. Thanks for reading.