Lol, I guess I'm still sick. I started with bad sore throat then sinus but thought I was well. But after the day I've had I think I'm still under the weather. I would love to experiment with you but havent had a last happy hatch losing three babies snuggling with mama too close and getting caught in feathers. I do have three beautiful showgirls and three beautiful silkies out of that after removing adoptive moma. They are now five weeks old. So need time to get over those losses.
I think those old writings are interesting though. Once I read an old poultry book that gave directions to water drinker for chickens that didnt freeze. It was a wood barrel that sat on compost I think. Anyways I have tried to find that poultry book that it was in online and have been unable to.
In this writing from Aerostotle, he also mentions that some roosters were butchered and found to have eggs in them I think. Unless I dreamed that, lol. I suspect that chickens change sex or have both more common than we are aware of, lol.
I think that sexing eggs is quite similar to sexing a pregnant woman's belly. Some carry girls in front and some carry boys all over. Yes, we women think that mostly good way to tell but know not perfect 100% way.