Any new beekeepers that bought their hives online or from a local farm supply and were given entrance feeders to feed their colony. Entrance feeders are feeders that are on the bottom board at the entrance reducer. With this cold weather coming your hive is in very real peril of dying. The bees will not be able to get to the feeder because they will be clustered at the top of the box and will not go down to the feeder.
They will starve to death.
Get a new feeder today.