I have one hive that is doing amazing work. I have gotten all of the frames out of the hive that had foundation except one. Strange thing is, I needed to help with crowding and supplement another hive on Saturday...so I inspected the hive and removed four frames of brood and bees.
During the inspection, I found he usual honey and pollen frames in both upper and lower HB's with six frames that they use for brood. Anyway, all of the frames had brood in them other than one...It was the last frame with foundation!?? Go figure?

I am just wondering if I happened to catch it at the time when all of the bees had emerged, or is the queen not liking the size of the cells.

My next inspection...if it is still empty, I will remove it for good and use it in a nuc or something.