I have been 2:1 sugar feeding my hive for 3 weeks in prep for winter and because we are in a bad derth/drought. I have 2 Deep Brood Boxes due to anticipating a harsh winter. 2 weeks ago the hive was almost empty of honey with only 1 frame with some on it. Now, several of the bottom brood boxes have capped honey along the top above the brood. I found larva around some brood but didn’t see eggs. I didn’t see the queen. I was in somewhat of a hurry so I didn’t inspect a ton. I did find that almost 8-9 frames had uncapped honey/sugar water. I also noticed a peculiar smell. I can only describe it as sour/fruity.
What should I do? What is the smell? The brood looked fine and healthy. Could it be the sugar water fermenting? It was rather cool here and the weather changed to 93-95 temps for the past 7 days. That is when I noticed the odor.