Hi TMN !
first you know I will throw a ton of questions!
what breed and whats up with fertility? shipped or your own?
My second hatch was a test batch for someone else, so the fertility issue was not a surprise. For the Easter hatch, many were mine and it was a test hatch for my VERY young roo... One of his was the only one to hatch, but only 2 developed out of 13i set. The other fertility issue was with my mystery swap eggs that were shipped to me. Out of 8 Silkie and 4 Serama eggs, only 2 silkies even started developing, and one developed a blood ring by day 10. The other tone made it to lockdown along with the one of men that hatched and the other one of mine that didn't. This hatch are shipped Am eggs. Out or 10, 6 went into lockdown...
did you eggtopsy eggs from the last batch? what were your results?
I have opened all of the ones that wet to lockdown and didn't hatch. For the Easter hatch, the Silkie looks like it quit around lockdown. The chick from my egg was fully developed and never pipped, however, that is the egg I found out I had been incubating upside down until day 16! Don't ask me how that happened... I'm still trying to figure it out!!
For the NYD hatch, I had several that I needed to assist, but I think I opened the bator too many times and shrinkwrapped some of them. Some of the assisted chicks made it, and some I waited too long. One literally stopped breathing as I was taking it out of the bator to assist. They were all fully developed. Some never internally pipped, some never externally pipped, and there were a couple that externally pipped, then quit.
calibration was done on thermometers and Hygros?
I have not calibrated, but I had 2 hygros and 3 thermometers in the bator. The hygros in the bator read the same, but different than the hygro on the top of the genesis. The thermometers read the same.
your not high altitude right?
Nope... Northern MN... Only high altitude here is the top of the iron ore mine dumps!
you have read the humidity section in the hatching 101 article? do you weigh or watch air cells for weight loss?
I have. I tried the dry incubating, and I was concerned that was the problem. This time, I have duck eggs and turkey eggs in for my staggered hatch, so I'm keeping the humidity higher. Shooting for 50%. I haven't weighed the eggs, maybe I need to start. I have watched air cells and as far as ,y inexperienced eye can tell, they seem to be right where they are supposed to. A couple for the easter hatch had saddle shaped cells. They didn't make it...
I have my bator at work, which keeps me a bit more hands off during lockdown. I worried that I opened it too many times to assist for the Easter hatch, so this lockdown, I haven't touched it. I even assisted through the vent holes! But I have to open it today to take the chick out. She hatched on Wednesday.
https://www.backyardchickens.com/a/hatching-eggs-101