I had a hen who had been sitting on eggs for over a month now, the first set got eaten my a snake on day 5 so I went and gave her some more. Day 13/15 I went and checked on her and she broke 2 eggs with babies in them, we thought maybe the other chickens did it so we moved her and her eggs to a new place. Day 20 or so I checked this morning and the last egg with a baby in it had been broken and the baby was laying In the next next to her. I couldn’t find the eggshell and It’s feet were tucked in and it’s head also. I’m guessing it didn’t hatch just yet. Why did she do this? We are going to go ahead and break her broody because she can’t seem to not break the eggs.