I've had an unusual number of hives go queenless this year. All of them have requeened either on their own or with eggs/brood from another hive put it -- except one. This was a hive that was quite strong coming put of winter, and it's been going down ever since. This weekend I put another frame of brood/eggs in, and wondered whether it was even worth the effort, seeing as they probably wouldn't build up strong enough before winter. But then I could combine it with another hive I have that has a queen, but is just barely surviving. The others will be strong enough for winter, but only two are producing honey. :'(
-- Kris