It is not as likely as other problems but humidity below 25%, getting into the single digits is similar to incubating at below 97F for temps. It is a zone of death and bad hatching. You can still get some to hatch but not that many
Experimenting with humidity would be to find the humidity...
from your egg topsy, two or three of them had a blood spot from a dead embryo...Or at least I thought I saw that. Those are early quitters and were fertile if so.
It is fine but why do stuff that goes against poultry science? We do learn from studies and science.
BTW, several of your duds may have been caused by the low humidity
:hugs
Sorry!
It was a long day at work and I swore I gave this advice at the beginning of this. I try to help those new to incubation to not fall for the literal: don't add water for a dry hatch spiel that is out there
Humidity below 25% is too low. You are risking numbers 5,8,9,10,13,17 and 20 as listed in the uploaded pdf.
Humidity should be from about 35% to 55%.
Be prepared to help them when they hatch
:barnieYou are in the bad range for humidity!
Dry hatch does not mean no water it means lower than traditional humidity. Humidity varies from place to place so you need to add water sometimes.
451 F is the temperature that paper burns.
It was on the reading list when I was in school, along with animal farm and Lord of the Flies..There were others too