My broody hen hatched her's on Mothers Day. Monday I checked and all 4 original eggs had hatched. during the lockdown she would not let me near her. Later in the afternoon I discovered she had 2 new eggs so I took them away and she got down, the chicks right behind her, and started taking care of them. They do get off the nest for during the incubation period and sometimes the eggs get cool. But since it's been so hot it didn't matter. She hatched 4 out of 4. I have 2 more sitting and one that just started today. I am overrun with broodies this year. LOL I haven't had any luck at trying to break them. Sometimes you just gotta let nature do it's thing.