I usually track 2 different hatch rates. Set-hatch for fertility, and lockdown-hatch to judge how well my incubation techniques are working. On the 12 eggs that did nothing, you mean they did absolutely nothing? No development at all? Did you crack them after you incubated to check? I'm not surprised that you have fertility issues with 1 roo over 23 hens, but that still doesn't explain the developed chicks that are dying in the incubator, or after the hatch. Yes, my saying a minimum of 30 chicks is based on at least 90% of them being fertile. I will say that I would bet money on hatching at least 75% of fertile eggs
I only opened 2 of the 12 eggs that did not pip. One had a full formed chick in the right position. The other popped when I cracked it and it was a stinking black mess...which is why I didn't open any more eggs. Through my 2 hatches, I am averaging ~18% infertile eggs. I am hoping for a higher fertility rate in this hatch. My flock has shrank to 21 layers in this time, and the roo has had 5 weeks to recover from the dog attack.
