I have had my hives for almost a year. I have a deep and a medium. The entrance is at it smallest opening. I have a lot of activity today bees all over the front of the boxes. Bees are crowded going in and out. Some are going in the vent hole on the front at the top. My question is are the bees going in the top because its crowded at the entrance or are the bees going in the top robbers. Bees are hovering and flying around the front and some going in the top and some the bottom. It rained all day yesterday and its 50 and sunny today.