Naturally I was a bit excited to see bees coming into the hive with plenty of pollen. The weather is really nice, yesterday was the first day since putting my two nucs in hives that the wind hasn't been going full bore. Then I noticed a few fighting, and a few dead bees already laying on the ground around the hive entrance. So I closed up the entrance, much to the disapproval of a fair number of bees. Will the robbers give up in a few hours, or tomorrow, or should I leave them closed up for a couple days?