Although you probably vaccinated your horse in the spring, make sure it has been immunized against tetanus. Horses often get undetected cuts in the winter that are an ideal environment for the tetanus microorganism. Now is a good time to have your horse's teeth checked. It is advisable to remove sharp points on molars before feeding winter hay. It is advisable to remove your horse's shoes if it will not be ridden in the winter.
Loose shoes can cause serious injuries.
Make sure the horse's hooves are properly trimmed. And do not forget to have them trimmed periodically during winter. Do not turn horses out, even for a short time, with a halter on either. Injuries happen all to often when a horse catches a halter on a fence post or tree limb.