It's cold outside by Texas standards. We are in the middle of what could prove to be our first icy event of the year so tonight I pulled out the best thing I've bought in a long time.
A water trough heater.
A special order item for my area, one can be found online with numerous retailers.
You can get them for any size trough, or buy a actual heated bucket if you stall.
Not only does having one save you the headache of breaking ice, but they also help to prevent colic and keep your horse hydrated (by keeping the water a inviting temperature).
Even if you only have a few serious cold snaps a year a trough heater can pay for itself with piece of mind with it's very first use.