Usually with exception like those, yolk not being absorbed for whatever reason I give the animal 48 hours (to see if it is gonna make it to start with), this mean alone in it's own tub with moist paper towel, then I offer food that is the appropriate size.
I do not wait for them to shed I just go an do it within the first few days, some times even that small and with such a start they will eat on their own (depending on how weak or not they are) and in a lot of cases they will need to be assisted a few times.