Right.. I had the impression (may be wrong) that bad genetics produce malformed chicks. The temperature is 37.8C... per the incubators. Or you mean temp fluctuation?
For quail - days 0-13 - 50%
days 14 -Lockdown at 60-75%
I have chicken right now in the incubator, days 0-17 - 37.7C and 35-45% humidity.
I am planning to do lockdown on day 18 and increase the humidity to 60-75%
I had several quail chicks fully developed, but did not pip and died. I only found one article that said possible reason "Humidity". but did not explain higher or lower humidity. I honestly do not think it is low humidity as I keep it to 65-75% during lockdown. Any other reasons?