Check Gutters & Downspouts on your
Barn
Remove leaves and debris that would cause blockage.
Clean Cobwebs in your Barn
If you are inclined to close or partially close the doors on your barn during the winter, knock down those cobwebs. Dust accumulates in cobwebs and knocking them down will help control dust. They are also a fire hazard.
Bring Anything in from your Barn that will Freeze
Fly spray, shampoos & any liquid that will become ineffective when it freezes and thaws.
Unhook your Hose when you are not using it, especially Overnight
Frozen hoses and buckets can be a problem in the winter. It is important your horse has fresh, clean water. Stay away from plastic buckets during the winter, they tend to become brittle and crack. You can also use heated buckets or trough heaters, just make sure that things are wired properly or plugged into a GFI (ground fault interrupter) outlet.
Check Indoor/Outdoor Lighting
Make sure you have checked bulbs and have spares on hand - shorter days means doing your barn chores when it is dark.
Check your Barn & Run-In Sheds & Stalls Your horses will be spending a little more time under cover and in their stalls. Check for anything remotely sharp on doors, feeders and racks and fix it. Check stall walls for any loose, split boards and repair or replace as needed.