Nurse bees can be shaken in, no problem.
And, how do you separate the nurse and field bees? If you put in a frame of brood there isn't a problem. Maybe because not queen right, but I sure could see the event causing robbing, depending on the flow.
I think if it were me I would find another frame with fresh eggs and try again, just take whatever is on the frame. Maybe get the queen from the donor hive instead and the donor hive will requeen much faster (in my opinion) than just a straight split with fresh eggs.