Smallest hive cluster to make it through winter
In your experience, what's the smallest hive cluster you've had make it through winter? One of my hives was looking like it was about to collapse (I'm guessing from starvation) and had about half its population dead on the frames and bottom board. I did a emergency feed with some fondant. I'd estimate the remaining cluster to be no larger than a softball.
Apart from the emergency feed, any other tips? Would pollen patties make sense?
I'm in the mid-Atlantic so we've got a few weeks of cold weather to go.