Hypothermia is a term used to describe a body temperature that is below normal, and the most common cause is prolonged exposure to cold environmental temperatures. In addition to exposure, certain medical conditions such as hypothyroidism may be a factor in the body's inability to maintain adequate temperature.
Normal body temperature in dogs is 100.5 to 102.5 degrees Fahrenheit. Signs of hypothermia include but are not limited to:
- Depression
- Lethargy
- Weakness
- Shivering
- Muscle stiffness
- Low heart and respiratory rates
- Stupor
- Difficulty breathing
- Fixed and dilated pupils
- Coma
Frostbite is injury to the tissues that occurs when an animal is exposed to freezing temperatures accompanied by high winds. Areas which are primarily affected are the feet, tail and tips of the ears and unfortunately, frostbite injury is often not apparent until several days later. Watch for:
- Skin discoloration on the ears, tail and toes
- Pain and swelling
- Blisters
- Sloughing of the skin
- Skin ulcers
(Source: Dr. Bari Spielman and Dr. Dawn Ruben, http://www.petplace.com/)