I rotated out a frame with plastic foundation from my brood box (first time). One side had about 30% of the cells filled to some degree with pollen and another 30% filled to some degree with nectar. The other side was empty. I left the frame out for the day for the bees to take back the nectar and I am wondering if they would take back the pollen as well. I've brought the frame inside since it was going to rain, but I can put it back out if they can (re)use the pollen. Waste not, want not.