We went into winter with 36 hives and now have 20. We feed last fall to be sure they would have enough to get through the winter. January we opened the hives, on a warm day. Still had plenty of honey, active, no brood. Added a pollen patty and closed. Last week we finally got some warm weather and found 16 dead hives. All still have honey, none have brood. Some have no bees, not dead or otherwise. Some have a small cluster of dead bees on a honey frame. Anyone have any ideas? The rest are looking good, no brood started yet, but active bees bringing in pollen from somewhere.
Also had a hive 7 miles from here. It's the same story, no bees lots of honey.