One of my hives was struggling this spring so I requeened it. During the summer its numbers never really grew as large as I wanted, but I always found brood and eggs along with honey stores. I checked the hive a month ago and I knew it didn't have enough honey for the winter, but I went out yesterday to check them and the entire hive had died, apparently due to a brief cold snap. The hive did not have a single cell of honey. I am somewhat perplexed at how it is possible that the hive did not have any honey at all. Do you have any ideas as to what would cause this?