Cackleberrycoop,
I'm just saying that they found nothing to support that the temperature, or anything else they could determine, had any effect on the ratio of males to females and that if there were a correlation, hatcheries would be using that method all over the place. There have been so much studied and learned about poultry for the business end of it, that if there were techniques to improve production or a way to manipulate hatches, they would be utilizing it. If you can figure out a way to produce more pullets, you could make a fortune.