I would suggest placing a burlap bag or piece of plywood over half of the brood box while you inspect the other half. Robbing is especially difficult to control during a dearth. In this part of the country, that is starting now. It's during these times you will want to be even quicker with inspections. When inspecting, the beekeeper will want to find eggs and larvae (queen right), look for signs of disease or test for varroa, check for ample food stores, and assess the strength of the colony then close it up. If you find the colony weak and hopelessly with out a queen going into the fall, do like Wandering Man suggests, combine with another colony.
Moving the hive may have made the situation worse. Were foragers left behind during the move? Losing a portion of the work force can be very detrimental. No matter what, I would feed this colony with an in-hive feeder.