Thinking I might feed them to help them get started.
Later in the day I checked the four older hives. Two had enough bees to add a third deep. Two were doing well, but still had enough empty space I figured I'd leave them with just 2 deeps for a few more weeks.
Also figure I should've given the swarm a frame of capped brood so they wouldn't need to feed them and they'd have a lot of nurse bees soon... maybe next time.