Added a super (just foundation) when they were on about 8 frames, but they didn't seem keen on going up. Moved a couple of frames up to encourage them and they seemed to get going then and started drawing it all out. I say complacent as I think left them alone for just over a week after, only peaking through the clear crownboard to see how much they had drawn out, just assuming all was well below as they still had lots to draw so didn't go right through every frame. Little did I know they'd made 4 queen cells in the bottom box and promptly swarmed (I did get the swarm back at least). What do you think, too slow getting a super on?Had they drawn out all the frames by the time they swarmed / had you added a super? Or are you referring to something else when you say 'overly complacent'?
In fact have just been through them again this afternoon and knocked down another 11 queen cells, both on the bottom and on the face of the comb. Suspect they may in fact be queenless, making quite a hum, some capped brood but could not see any eggs or larvae anywhere.
My plan was to check again in 5 days, and see if there are any more queen cells, and keep knocking them down until they produce no more. If there are still no eggs/larvae at that stage, add a frame of eggs from another preferred colony?
Unless they still have an unmated virgin running around in there? It was only 10 days ago they swarmed.