Scenario- I did a cutout from an old honey house yesterday. The wall boards are 1 x 12's vertically mounted. Swarm had moved in a few weeks ago it was a small hive. I never did see the queen (as usual!), but after scooping some of the bees into a nuc box with the brood comb, they were orienting to it instead of going back to the wall. There was one large cluster of bees still in the stud space, but then they disappeared. I thought they may have found a hole and ran into the next space over, so I pulled the board back about an inch, but didn't see or hear any bees in it. I sprayed BeeDun into it and none came out then either. I then figured maybe they went into the nuc box while I was preoccupied. I sealed everything up and went home. Last night I went to get the nuc box and there was not one single bee on the wall. Brought the box home and looked inside. Only about half the bees were in there! Now I am again thinking I sealed some bees up in the wall space adjacent to where the hive was. My question is-- Do I need to tear it all open again? Or can I just drill a 1/2 inch hole in the space and do a makeshift trapout with a nuc box and a frame of their brood comb? Please help! I will be going back on Wed. morning.