I have no idea where my head was when I locked down my incubator. I believe that I locked it down on day 17 rather on day 19. The day I locked it down I candled and determined that I had 16 viable eggs, today I have only 2 chicks. Yesterday, hatch day, about 8 of the eggs had a pip and about 6 of them had broke a large section out of the shell but only two actually zipped the egg open. The rest died in the eggs, like they couldn't move around inside to zip it open. I feel HORRIBLE, I know I didn't do this on purpose, but I should have not made such a careless mistake. I'd like to try again (this was not my first hatch, last year I achieved 10 chicks from 12 eggs) but before I do I want to make sure that I don't repeat the same mistakes. The rest of the incubation process was perfection. About 40-50% humidity @ 99-100 degrees for all days before lock down. I used an automatic egg turner within a forced air incubator. I'm thinking they needed two more days of turning and everything would have been great. Anyone have an opinion?