Last fall I picked up an established colony from a respected local beek. The bees had lots of stores, had been treated for mites and were ready for winter. This spring, the queen didn't do much and had some chalkbrood. I moved the hive to a sunnier location, added a screened bottom board and requeened in late May via a push-in cage. A week after relasing her, there was no new brood or sign of the new queen. By the time a second new queen arrived, maybe 10 days later, there was still no new brood. I added the second queen under the push-in cage. She was out when I went to relase her, the bees chewed under the side. That was a 7-10 days ago and there is still no sign of new brood or a queen.
There looks to be plenty of bees (though less than there should be), they are calm and are bringing in pollen and nectar. The bottom deep is empty, the top has some stores.
Any thoughts about what's going on or what to do? I could have had 2 or 3 new nucs this spring for what I've got into this colony now, can I save it?