I have never used queen excluders but his year unlike the past 10 years I have queens laying in the supers,. I have done brood at the bottom edge of about 20% of the supers. I use 2 bottom deeps and I have noticed that the top deeps is are no longer filled with honey as they were when I place the supers on. We had a very bad spring and would appreciate your thoughts. What is the cause of drone brood at the bottom the supers. I don't think we have that many done laying queens or workers.