I brought home one of the trapout bait-hives today after the bees had filled it to the point that I don't think another single bee could have fit inside... so naturally I had to add another box right away. When I opened them I puffed one puff of smoke across the top bars to try to get them to stay down and not walk up to the top of the box where I was going to set the next box, and as soon as the smoke hit them, the whole hive went running like I've never seen before and about half the hive exited the front entrance and started bearding on the front. The bees didn't take off and fly and the few that were flying were never in any way aggressive, so I'm wondering what could have made them have such a strong reaction to the smoke? Could it be because they likely don't have any brood right now to stick around for? It's a brand-new queen so I doubt she's started laying yet, though I didn't check for eggs, but I know it hasn't been long enough for her to be able to.