When it is warm the bees may be able to move easily in the top box.
Sub-zero temperatures, can pull bees off of an adjacent frame of honey to keep the brood warm. The cold forces the bees into a tight cluster. If the extreme cold lasts for two to three days, starvation can occur.
Winter patties can help prevent starvation from happening. The cluster can get on the patty and consume the sugar to feed the brood if they pull off a frame of honey.
|The bees do eat winter patties. I put the patties where the bee are. In this case the bees were still in their lower box, so I put the patties there.|
|This colony was light on honey and I put a shim on the hive and loaded up the winter patties.|