I have 10 hives in my backyard. One is weak and is rearing a new queen. It is full of honey and pollen. I noticed a cloud of bees around it yesterday, but not much fighting outside. I first installed an entrance reducer, but they bees remained and were still squeezing through and going in an out. Then I closed off the entrance completely and the top vent and the bees at the front were gone by morning. I uncovered the entrance this morning and the bees came back. I closed it off once again and the bees are still flying all around the outer cover and the entrance. How long should I keep it blocked off? Will they just come back to rob after I open it again? Thanks, Jim