I never would have guessed that..... really, really?
One of the causes of hatch problems is hatching from pullet eggs. The chicks are just not all that "robust" It is also not a good idea to mix pullet and hen eggs.
It amazes me too. When I post that pullet eggs should not be set for hatching I get jumped on by those that say I do it all the time! It is fine! But it really is not fine. I try to set Large eggs, in the 50G range to 65G range. Jumbo eggs are hard to hatch too.NO, Really!!!
I just say that because in hatch-a-longs I can't get over how many people try to hatch their pullets first eggs.
I know they're excited, but still!!