How long do I leave the eggs under her. We got 4 chicks that hatched Friday and Saturday. The 21st day was Friday and Saturday. This morning we found a partial hatched egg witha dead chick ;( Not sure how long its been there. Please we need advice, the Mom is up in a nest box with the chicks blocked in, so they don't fall out. WE would like to move her to a dog crate, but not sure if any of the eggs will hatch?