I am a hobbiest beekeeper with two hives and while working with one of my hives I noticed a strange smell in the hive. It has a sour smell like something going bad and is pretty strong. This is a new hive that I just set up this spring. I have been feeding this hive sugar water for about a month to get it set up for winter. I have only been beekeeping for about two years so I dont have a lot of experience but I have never smelled this before. Could this have anything to do with feeding sugar water or could it indicate something else? Any help would be appreciated.