Fishkeeper
Crowing
If they aren't broody, they won't sit on the eggs, so the eggs won't develop and grow. You need to collect those eggs before they rot and explode. You can't make the chickens care for the eggs by putting them on the eggs. Chickens don't understand what to do, they do it by instinct, and they need to be broody to care for eggs. They won't see the eggs and think "oh, I should care for these".
If you want to hatch eggs but don't have a broody hen, get an incubator.
If you want to hatch eggs but don't have a broody hen, get an incubator.