I've heard that taking 3 or 4 frames of brood from a strong hive and relocating them in a new hive is one possible way of doubling your colonies and helping to prevent swarming. As I heard it, there is also no need to queen the new colony because some of the un-hatched cells in the relocated frames will contain queen larvae that would otherwise be killed if not moved from the original colony. Any truth to this? More importantly, is it a good way to increase the number of hives you have? And does this work to stop or slow down swarming? If this is one reasonably sane way of building the size of my apiary and/or controlling swarms, when is the best time to try it? When is the cut-off; latest possible time in the season I could attempt this?