OK, Thanks.. Twice I had the bees fill out one side of the foundation, and more or less "move" to that side, which I assume is the side the queen was on, and more or less stop using the other part of the box.. I have heard horror stories of queen cells and swarming because the bees suddenly thought they were crowded or queenless.. but Have no idea how full those hives were or if there was a flow on. I do know the hives I had issues with were moderate. A lot of bees, but not sure I would say either was "strong".