animals...when pregnant will give birth when ready...IF for some reason they do not or cannot dilate for the actual birth to occur...then the babies cannot come out --and she will die...yes it happens....yes I imagine it hurts...I have had a few rats and a bunch of mice die like this over the years....not much we can do about it...I have used tem as food when I see the female is in distress...but you have to know they are not going to actually give birth and they are going to die...

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........JY