Stress and anxiety attacks
Stress and anxiety can also cause dogs to shiver. Fireworks, thunderstorms, an unfamiliar environment, travel, or any kind of change in routine, are some common triggers of anxiety attacks in dogs. Besides shaking, dogs may also respond to stressful situations by hiding, panting, growling, and displaying other aggressive behaviors. Once you have identified the common triggers of anxiety, you can use some behavioral training methods to help your dog overcome them. Your veterinarian may also prescribe an anti-anxiety medication, like clomicalm, and also help you explore some therapeutic options.