Refreeze milk?

Me

We thawed frozen breastmilk for daycare, but our daughter didn’t eat nearly as much as we expected. It was her first couple of days, so we weren’t sure how it would go. When she’s home, I prefer to nurse her. Since it’s the weekend, my options are to bottle feed with the thawed milk and pump or refreeze the milk and nurse.

Can breastmilk be refrozen to be thawed later or do I have to toss it all (about 18 oz)?