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It is a pain. But the ability to properly sex hatchlings is a skill that takes many years to perfect. I don't think there are enough people with that level of skill to man all the hatcheries around the globe. If you think about the egg industry, someone has to sex and cull about 8 billion cock...

:fl This cockerel issue has been going on for 8,000 years since humans first domesticated red jungle fowl. They have always hatched at about a 50:50 ratio. That's is likely because roosters give themselves up to predators in an effort to save the flock. Then there will be another waiting in the...

Unlike mammals with XY chromosomes in males and females with XX. Birds, most reptiles and some insect females have ZW chromosomes and males have ZZ chromosomes. That means the female dictates the gender of offspring.

So if the goal is to hatch a higher ratio of one sex over another and we acknowledge we can't change the sex of the embryo, altering the temperature (if that even works) is doing nothing more than killing the embryos of one sex in the shell. What's the difference in that and killing them after...

There is no way to change the sex of an embryo after the blastodisc has been fertilized 24 hours before an egg is laid. Temperature out of ideal range may possibly favor one sex over another but that just means more embryos are going to die.

Been studied but has no impact on sex of embryo. I refer you to post #71 above.

I sure wish people would stop perpetuating old wives tales that have been proven false. Especially those who should know better. It can be harmful to do so. In the 1800s and earlier, it was probably OK to spread anecdotal advice, as false as it may have been. But today with such good research...

Normally I have a larger percentage of pullets but in the last year I've had 3 hatches that turned out to be mostly cockerels. There have been studies but none have borne out to have any influence other than the ZW chromosomes the hen contributes. If there were a way to influence sex...