When you split a hive what do you do to keep the split off bees from abandoning the new hive and returning to the old one?
How can I tell which are the nurse bees.As Omie said, move the half with the queen. Shakein a couple extra frames of nurse bees. All the nurse bees will stay with the queen. Only the foragers will return to the original location. Then in a week, do the switch if needed, but likely the original location will be the weaker one.