Egg Color and Hatch Success

[KellyMP]

I seriously doubt the color of the eggshell had anything to do with it.
But they were laid by different hens, that could. At least some of them started to develop so they were at least fertilized.

Which incubator did you use? Did it have a fan? That might help with the "position in the incubator" theory.

Of the seven eggs laid by these two hens only one hatched. With the other eggs hatching I don't think it was an incubator or rooster problem. So something with those hens.

For an egg to hatch it has to be put together perfectly. It is possible something is wrong with those hens in how they put the eggs together. It could easily be something you cannot see visually. Porosity is a possibility but I'd think that would affect the egg later in the incubation process, not early on. You got lucky with one of those eggs.

It is possible the she is not processing a certain nutrient correctly. The nutrient, whatever it is, is available as the other hen's eggs hatched, but the other is not eating it or maybe the body just doesn't process it.

I've had it happen where none of a certain hen's eggs hatched while others had a great hatch rate. But those never started to develop at all, I don't think they were fertilized. I don't know what happened with yours.

So, the eggs made it past day 7 when they died. I just candled a new batch that I am trying and once again all are doing great, veins, movement in the embryos, etc. So, 17/18 eggs are developing. I am trying a larger hatch as I had to get rid of my rooster sadly. This is where the air sacs are on day 7. Some are smaller than others, so wondering if they are at a decent average or need to be larger. I’ve kept the humidity a bit lower this time, around 40-45.