I had a baby hatch out like this a month ago... I had to cut the cord... Tie it off with thread and then take the yellow yolk of a chicken egg that is room temp and mix it up good. Then take one of those baby syringe that have no needle point and "pump" the babies stomach with the yolk. I had to do this a few times until she took pinky rats on her own.

He/she will be ok...