"riverbee, no bees were kept inside. From what I read one person's woodenware was allowed to dry and air out outdoors while the other one was kept indoors to dry and air out. The bees that died were housed in the woodenware that was allowed to dry outdoors.
I'm thinking starvation...whether from a too dilute mix of syrup or either from letting the feed run and stay empty for too long. To survive those temperatures they would have had to have access to feed. All the previous is, of course, in the case that no toxic substance killed them."
yep, misread that ed. with that said i have said twice, two strikes against this hive, hived on foundation in cold temps with a syrup feeder above them. continuing cold temps, bees clustered on foundation and won't move to the syrup feeder. =starvation. different story if they were hived on drawn combs with honey in them. if both hives were under the same circumstances, dunno why one made it and the other not.
per don and the email he received about it and also considering his reported weather:
"It was so cold the night we got and installed our bees we didn't spray them at all but we did a little bit on the inside of the hives on the foundation.
We removed the queen cages on Saturday. That's when something happened because both hives were alive at that point. When we took the queen cages out, there were so many dead bees on the bottom of her hive we were both shocked! ".
i utilize package bees to draw foundation in the spring, but i will not hive them here in temps below 60 d F and nightime temps at freezing, on any foundation with a syrup feeder on top for this reason. the packages are hived on drawn combs and combs with honey in them to start. i have seen too many beeks up here hive package bees on foundation with syrup feeders on top and yes, the bees died of starvation because they didn't break cluster to get to the syrup feeder.
don, just my two cents, and i don't believe there was some toxic substance. in cooler weather the bees aren't flying to get into anything.