I'm sorry to hear about the chick not surviving...
But, from research I've done previously, and from brief memory now, the more common reasons could be;
- Shrink wrapping ; When an egg dries out, I think from low humidity.
- Drowning ; When humidity levels are too high. The chick gets too wet and drowns. I think 85% might have been a little too high, in my opinion. I just needed around 65% to get a decent hatch rate.
- Low viability/Low fertility rate
- Weakness ; Some chicks can die whilst still pipping or even before that.
- Born wrong ; I don't know if there are any proper terms for this, but it could of been born with a birth defect and wasn't strong enough.
- Bad genetics ; Probably passed down from the parents, it could be from in-breeding continuously.
But, from research I've done previously, and from brief memory now, the more common reasons could be;
- Shrink wrapping ; When an egg dries out, I think from low humidity.
- Drowning ; When humidity levels are too high. The chick gets too wet and drowns. I think 85% might have been a little too high, in my opinion. I just needed around 65% to get a decent hatch rate.
- Low viability/Low fertility rate
- Weakness ; Some chicks can die whilst still pipping or even before that.
- Born wrong ; I don't know if there are any proper terms for this, but it could of been born with a birth defect and wasn't strong enough.
- Bad genetics ; Probably passed down from the parents, it could be from in-breeding continuously.
