I am a first year beekeeper with a new problem I can't figure out. It is most likely a problem I caused, so if I can figure out what happened, maybe I can avoid this problem in the future. I had two Langstroth hives side by side, one in a single deep with six frames of bees, one in double deeps with thirteen frames of bees. I checked them last week and they both appeared to be fine, plenty of honey and pollen stores. I checked them yesterday and all the bees and honey have vanished. There are about twenty dead bees in one hive and zero dead bees in the other. There are no dead bees on the ground. I did see a lot of bees flying around one hive last week, right after the check, but I just figured my gals were enjoying the warm day. How can I go from two hives full of bees and stores to zero bees and honey in a week? I have the entrances reduced to about two inches, they left just a little bit of spotty capped brood....if anyone needs more information please ask. I want to continue in beekeeping next year, but I have a lot to learn.