My hive is about 3 weeks old, it's a 10 frame hive that came from a 5 frame nuc. When do I switch my entrance reducer from the smallest entrance to the largest? I worry about robbing, but at times it seems like a very high traffic area. It looks like an interstate backup going into the hive. This is not all the time, but when they are doing orientating flights, or like today when a thunderstorm was coming in. The girls almost got caught out in the storm. It was fun to watch all the foragers coming back to the hive just before the rains came in.