My husband is the beekeeper and this is our first year with two Warre hives. We could see through the observation window that the first box was almost full. He was concerned about swarming and decided to add the third and fourth box. He also did this to the second hive, which doesn't seem near as active and was quite a bit lighter when he picked it up. Well, twice today, from the weaker hive, there was a crazy burst of activity for about twenty minutes with lots of bees flooding out of the hive and acting agitated outside of the entrance. My husband thought he saw quite a few large bees, which he thought were drones on the outside. Does anybody have some opinions of what might be going on ? Are they possibly preparing to swarm?