As you now know, the question "why do dogs shake" can have various answers. Some of the benign reasons for dog shaking or trembling include being cold, excited, stressed, anxious, or scared. What's more, your pup might be just seeking your attention. Quite a different situation with dog shivering happens when reviewing health-related concerns. They include food poisoning, old age, GTS, and other diseases, which in many cases can be prevented by vaccination and regular vet visits ...