If you are breastfeeding, going up to 14 days with no poo is very normal, the are only getting rid of the extra breast milk they don't need. If you are FF I would contact a doctor to get it checked out.

My DS was in the NICU for the first 10 days of his life so I know how stressful it can be when they started doing something unusual.

Hope this sorts it self out soon.

Tracey