That humidity isn't way off, not enough to cause the developmental problems you are talking about. I would be more suspicious of temperature. I also believe that what a lot of people call shrink-wrapped is not actually shrink-wrap. I could be wrong, but is it even possible for a chick to become shrink wrapped in an unpipped egg? The membrane is going to be very tight against the chick, even in a healthy egg. From what I have experienced, I don't call one shrink-wrapped unless it has pipped and the membrane has dried out. I only bring this up, because so many people try to assist chicks that don't need to be assisted. I don't assist at all any more. I have only ever had one chick that I assisted live. I would much rather them die in the shell than have to cull a deformed, but fluffy, chick a few days later... I have two incubators
EEK!
Okay... so I have two incubators. After most all of my first hatch was shrinkwrapped I needed to find out why~
#1. LG 9300
I checked the hygrometer in this one ( salt test) and saw that it was off by 5...so it says 50 it is really 55 in there. I made note of that during lockdown. (only use it for this purpose)
#2. Hovabator- I use this one for incubating.. and at the time didn't test the hygrometer because I needed it to reg. the temp.... BUT... After finding that almost all my chicks going into lockdown are very small celled...
I took the one that I did test... and placed it in the bator of the one that hasn't been tested - after one hour of time.....
Tested Hygrometer is showing 40 in the incubator
Non Tested Hygrometer is showing 35
Which means that the humidity in the incubator day 1-18 has actually been 45 and my non tested hygrometer is off by 10!
Does that sound crazy... it being off by so much??
Would that account for such small Air cells going into lockdown??
Is one hour sufficient amount of time to compare the two readings?
For reference... I use this one... that was suggested by many BYC members.
http://incubatorwarehouse.com/incubator-remote-thermometer-hygrometer.html