One of my six colonies either has a mouse in the hive that’s scaring all the bees to the very top of the hive, or the colony is completely starved for honey. Either way it seems like most of the bees (and they’re grumpy) are clustered above the top bars and living entirely off dry sugar I added about a month ago. The bees are so crowded above the top bars, they’re constantly walking in and out around the top entrance, as can be seen in this photo I took during my lunch break today:
I also noticed many dead bees in the snow in front of the hive:
Not that dead bees in the snow are unusual, but none of the other hives have many dead bees nearby, hardly any. This does not bode well.