I think that they can hatch even if they are left for a day. As long as they are incubating now I would think they could hatch.
Of my current broodies I had one sit on a nest, hatch one chick, leave. Then the next day another hen took her turn and hatched hers. Then another hen got her chicks. I'm not sure how long the eggs were cold, but probably for at least a day.
Of my current broodies I had one sit on a nest, hatch one chick, leave. Then the next day another hen took her turn and hatched hers. Then another hen got her chicks. I'm not sure how long the eggs were cold, but probably for at least a day.
Seem to be doing well! 