One of my hives I had planned to just use for production due to a higher ql (80) went noisy today with under 0.4kg's of honey, it did have 2 sugar in it though, which had 5 sugar in it yesterday or day before. I had been taking the honey out of it daily.
Okay not sure why, but looking at it again after imp'ing up the new hive to put next to it, it is now just active.