Ted, Hive one is a swarm from June 30th this year. I am guessing the queen is two going on three years old I think her days are numbered. Hive two has a Minnesota Hygienic Queen from this year.
Lburou, I think you are correct on the PMS. I did not sample this hive, but I did sample the hive next to it and had 24 mites in 300 bees. So I have been treating all of the hives since the first of August.
This hive was a swarm captured June 30th and placed on one frame of capped brood and the remaining frames were foundation. I treated this hive with OAV on July 5 and started treatments with Apiguard on August 12. I will test hive on September 1 and act accordingly. I may go ahead and put a new mated queen into this hive replacing the old girl.