If you live in a rural area, beware of leghold and other types of traps. Thousands of wild and domestic animals die or suffer crippling injuries because of these traps each year. When you walk your dog during the evening, wear a reflective vest and keep your dog's leash short for safety. Keep your pet inside as much as possible, especially during bad weather. Animals can get frostbite and hypothermia just like people do.
Older pets are also more likely to slip on the ice and suffer a broken leg.
When your pet comes inside, have a towel handy to warm and dry your pet. If you have a longhaired dog or cat, trim the hair between its paw pads to avoid the formation of ice balls. If your pet must stay outside for long periods of time, make sure there is a shelter available with blankets and water. The shelter should be just big enough for your pet to lie down in, so that it will retain body heat. Check the water frequently to make sure it is not frozen.