It's exactly a month since we installed my friend's nuc into a 10-frame deep. In that time, they've drawn out 4 frames and filled them with nectar and pollen. Only one side of one frame has capped brood, larva and eggs--good, tight pattern. In the center is a supercedure cell. Lots of bees; can't find the queen, but know she's been there within the past 3 days because of the eggs. Left the supercedure cell there. I know they're building up way too slowly but don't understand why. What would you do? Let the new queen supercede? Buy a new queen? Give them another frame of brood? Thoughts, please.