I was out of town in early June for about two weeks this summer. When I returned, the landowner where I keep my bees had phoned and left a message.....four days previously.
"Something is wrong with your hives, they don't look like they are supposed to."
So I ran up there as fast as I could, and two of my hives had been knocked over. Four deep boxes were all on their sides and scattered about.
The weaker of the two hives was done - the queen was missing and mice had moved in and damaged the comb. I moved what remained to a nuc, queened them and gave them to a new beekeeper nearby to work with.
In the other, however, the bees had glued all the frames that they covered together and sealed one end of the frames with propolis - essentially re-orienting the hive. They were coming and going through the tops of the open end. They had been there that way for at least 4 or 5 days.
I set them upright and back into position, broke the frames apart and put some feed on them. Now they are filling a Ross Rounds super and a medium for me. Amazing the kind of abuse they can take.
We (the landowner and I) think it was probably a raccoon that toppled them.