I have two queens arriving tomorrow. In order to get them started I was planning to split up my weakest hive into three nucs, similar to what Michael Palmer has described he usually does in July. My plan is to split all the the capped brood (around two frames), all the open brood (another two frames), and give each half a new queen. The old queen with one half frame of brood, two frames of honey and pollen and one empty drawn frame will remain in a nuc box at the old spot to keep the foragers. What I am not sure about is how many bees each split will need to keep the brood warm over night. It get's down to the mid 40s here. Can I just give each split with the new queen most of the bees and let the foragers return to the old hive and keep its little bit of brood and the old queen warm at night? Any thoughts?