On going through the hives to check that none are making swarm preparations I found capped queen cells on a drone frame I had placed to the outside. Two off the bottom of the comb and two about the centre. Frame mostly nectar, honey and pollen and a hand sized patch of capped drone brood; no worker brood that I remember. Everything else looks good, lots of eggs, brood open and capped and still some eggs and open brood in upper box. When is it allowable to destroy queen cells? My guess is we are two weeks to first frost and I already have two recent hives that I am feeding to get up to weight for winter so will be combining any hive that goes queenless. Anyways I did the unmentionable! Queens in royal jelly are sweeter than drone brood! The issue is complicated by the fact that I did some switching around and give and take amongst hives when completing hives for the two I made up recently; not certain that frame did not come from another hive, so for now will run with the hope that there is nothing wrong with that queen.