I think your analysis and review of the hatching is really important. This has been a learning experience for all of us, as much as an emotional experience.
Here's my own summary of my hatches:
May Hatching - Papa's Poultry shipped eggs
-Ordered 4 eggs
-Received 6 eggs, with unusually large air cells -- 3 Cream Legbar, 2 Lemon Orpington, 1 Jubilee Orpington
-5 never showed development, or were early quitters
--Only one egg made it to "lockdown" (under a broody at that point), and it did hatch.
That's a 16 % hatch rate, which is rather abysmal.
Would I order from Papa's again? Not likely, unless someone else let me know they recently got good eggs that were developing well, and it was a breed/colour I couldn't get elsewhere. That being said, the birds I have hatched from his eggs have been great!
June Hatch
-Set 29 eggs from 4 eBay sellers (4 breeds) in two incubators
-13 chicks made it to lockdown
-In the higher temp, autoturning incubator, 5 of the 6 chicks hatched
-In the lower temp, hand turned incubator, only 3 of the 7 chicks hatched, and one hatched on Day 24, after help
-8 chicks hatched from 29 eggs set, which is 27%. Pretty low, even for shipped eggs.
-This was skewed by the Legbar-Olandsk cross, because only one of those 10 eggs hatched.
What I did learn from this is that laying the shipped eggs on their side and putting them into the autoturner on Day 1 (after the requisite end-up rest for a day after arrival), did not give the eggs any disadvantage. They did better than the eggs that I set big end up and avoided turning for the first four days.
Will I order shipped eggs again? Yes! Will I try to get a broody to hatch for me? Yes!
If my broody is too tiny to hatch more than a couple of eggs, will I incubate? Yes
Am I grateful for this experience with this great hatch-a-long group? Big yes!!
Love seeing all the chickies. I may order more eggs in a few weeks. Would love to hatch with you again.