Checking the bees at the Granary, we found only a few small patches of drone brood in Sage despite there being lots of active bees in the hive. No eggs or larvae anywhere else so I guess the queen has lost her virility as we don't suspect a laying worker. We now have to make a decision on how to save this colony. Apollo and Zeus are both doing well so might merge them into Apollo. The problem might then be that Apollo has too many bees and may swarm.