I made a couple 5 frame nuc splits yesterday with mated queens, looks like robbing going on, I presume the foragers flew back to original hives, not any guards, or not many at all. I'm going to the beach, I just shut them completely off, I'll be back in 4 days, they have a boardman feeder with water, a pollen patty, and a hive top feeder with syrup. sound like the right thing to do? here's the video of the split https://www.youtube.com/watch?v=6AX4vImcgKo&t=68s
I've since learned that shiny black bees are robbers that have lost their hair, I see a few like that.