I believe humans have been artificially incubating eggs at least since Egyptian times, if I'm not mistaken.
A hen will not "just set" on eggs unless she is broody. If she is broody, she should set til the eggs, or a majority of them hatch. But each hen is different. Some might set until a few hatch then leave the nest, while others may stay stuck to the nest determined to hatch each & every egg, usually resulting in the live chicks dying from mom not teaching them to eat & drink.
If she is not broody, she will lay her egg & then leave to do her many busy chicken things.
Right now I have about 4 ding dongs that are determined to hatch out golf balls.
A hen will not "just set" on eggs unless she is broody. If she is broody, she should set til the eggs, or a majority of them hatch. But each hen is different. Some might set until a few hatch then leave the nest, while others may stay stuck to the nest determined to hatch each & every egg, usually resulting in the live chicks dying from mom not teaching them to eat & drink.
If she is not broody, she will lay her egg & then leave to do her many busy chicken things.
Right now I have about 4 ding dongs that are determined to hatch out golf balls.
