I had noticed a hive that had lots of bees on the outside. I opened the lid, and saw most of the frames had been filled. I heard this squeaking noise. Maybe "piping"? I was trying to see where it was coming from and there was the queen running across the top bars, almost like she would fly away. A few bees looked like they were chasing her. I found her on several frames (she was moving rapidly), always running and several bees acting like she was an intruder, darting at her or chasing her. Every once in awhile, I could see her pause, press her wings down and then I heard the noise. I found no developed queen cells, but there were queen cups and a few of them had eggs in them.
What do people think is happening here, why the piping and chasing?