Hey folks.
My clutch of six eggs has been pipping and emerging over the past two days. As of this morning, two had yet to pip. I returned home today to find one of them had pipped and the poor little guy hadn't created a big enough hole, and proceeded to get his head and neck stuck in the shell. It was all over by the time I arrived.
My question is, I've got one left. It looks bad (partially collapsed, dark colour.) How long should I wait before cutting into it?
The pic below is that egg from last week.

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-Paul