I looked at both my hives on Monday here in Atlanta when the temp was 65 and they were lining up to enter- it was a traffic jam with the bees brining in pollen. I had the entrance on the smallest opening. Since there was a traffic jam I decided to open up the entrance to the next largest (4 inch). Tonight it is supposed to freeze and I am worried that with the new entrance opening it may get too cold for them. What are your thoughts? Should I go put something in the entrance (maybe a piece of Styrofoam) to close it up a little to the original small opening or just leave well enough alone? It will be 27 degrees the next two nights. I always need to worry about something.