This winter don't forget to protect equine medications, veterinary supplies and other items in your tack room that can be affected by the freezing temperatures.
For example, extreme cold can trigger the breakdown of chemicals in liquid injectables and supplement products, rendering them ineffective, if not harmful.
Nor will freezing temperatures probably do any good for your ointments, salves, gels and creams. Signs of temperature-related damage include separation, off odor and discoloration.
If possible, keep medications in your house or a climate-controlled room. If something does accidently freeze and you can't find the storage information to determine whether it's still safe to use, ask your veterinarian about it. He can also advise you on how to properly dispose of damaged medications and other products.