This information was shared
with me many moons ago. I have found it to be very useful. I hope it helps
everyone else as well.
All eggs in nature are incubated flat. You'll never see a hen set them on the
small end and turn them. By laying them flat and rolling them 180 degrees each
time, you’re making everything inside the egg shift completely. This complete
shift is called “Making the Embryo Exercise”. This will give you a stronger
chick when it comes time to hatch.
The only time I'll incubate eggs in the upright position is when I get eggs
shipped in. Then I incubate them in the upright position for 7 to 8 days
without turning them at all and then turn them for the remainder of the 18 day
period. This stabilizes the air cell and gives the embryo a better chance to
start growing and get strong. You should let them rest at least 12 hours prior
to incubation when you use this system. When shipped eggs that have air cell
damage, it's best to have them incubate in the upright position the entire time
of incubation just tipping back and forth after the first 7 to 8 days. I've
taken eggs that have the air cells damaged so bad that they'll shift all the
way down the side of the egg and I've gotten a good percentage of them to hatch
doing it this way. This is my idea from getting hatching eggs shipped in over
the years and then nothing hatching because of air cell damage. I just studied
the eggs and opened tons of them that didn't hatch and came to the conclusion
that to get them to hatch you first had to get the embryo growing building up
strength. That was always the biggest battle. That's what blood rings are in
shipped eggs. The embryo starts and then dies because it can't attach itself
properly in the egg. Run your incubator with the air vents wide open.
This will keep the air healthier in the incubator and keep the humidity lower.
Only go by the size of the air cell in the egg to gauge the humidity in your
incubator. Some eggs dry down easier than others. Marans eggs will dry down
slower than Leghorn eggs. This has something to do with the egg shell but if
you go by standard operating directions and run your incubators according to
the incubator directions you'll have poor hatches. You have to shoot for
getting the air cell size to grow up to 1/3 of the egg by the time the chicks
are supposed to hatch. The smaller the air cell the wetter the chicks will be.
Small air cells will lead to a lot of chicks pipping and then drowning in the
As far as the humidity goes like I said, just watch the air cells. They're what
will determine if the eggs are incubating right. Sticky chicks are caused by
way to much moisture in the egg. What you have to think about is all the white
of the egg has to be gone when that chick is ready to pip out. Then what
happens ,if it is still there, is as soon as air gets into the egg when they
pip through, the white of the egg acts like glue and as they're pipping it's
drying and eventually it plugs the air hole and their nostrils up and they