I have one strong hive going into the winter. They are in two deeps and full. The weather has been real pleasant so fat, lows 40s high 60s. Bees are still real buy bringing in polln. I hve not been into the hive lately, but last time I did they had plenty of stores, pollen and alot of brood. I am still feeding some. Would they benefit by adding another box? If the queen is still laying, I afraid they might need more room. Need advice please. Thanks