Are they on one deep hive body or did you place the 2nd deep hive body??????? If you placed the 2nd deep hive body they are filling it up with sugar water if they are taking that much...When you inspect soon as possible since its been 3 weeks i would see if they are filling the cells with sugar water....I just filled my second deep hive body and placed my first medium super on sunday! I to started a 3 lb package in april! Two weeks before i inspected i took notice that they was feeding 4 times as much as usual! I took them off the feed and added the medium super....They are grown up now and its time to cut the cord!