Pets may shiver or shake for many reasons—pain, fear, anxiety, nerves, or simply being too cold. There is even an endocrine disorder called Addison's disease which can cause excessive shivering as well. We often see dogs shiver and shake during thunderstorms or July 4th fireworks.

What does it mean when a dog shakes or shivers?

Shivering could be a sign that your dog is in pain or suffering from an illness. Shivering and muscle tremors can be symptoms of serious conditions such as distemper, hypoglycemia, Addison's disease and inflammatory brain disease, as well as more common ailments like an upset stomach.

Why does my dog keep shaking his body?

Shivering and Trembling

This kind of shivering can be a sign of anxiety, cold, fear, pain, or even muscle weakness. If your dog has started to shake, and you don't know why, contact your veterinarian to make sure there isn't a more serious issue.