Remove Vehicle. You don't want to discover the significance of antifreeze by being forced to pull over, due to an overheated engine. Antifreeze contains lubricants and anti-corrosion agents to keep components like your radiator properly lubricated and free from corrosion.
Fear, Pain, Excitement. Your dog may shiver due to fright or excitement, an occurrence common in smaller or excitable dog breeds. Some dogs tremble when they encounter other animals, or if they have a form of anxiety in which meeting other people makes them overly anxious. Loud noises ranging from thunderstorms to vacuum cleaners and power tools can also frighten dogs to a point of shivering. Shivering can also be a sign your dog is in pain.
Pressure on a nerve by bone or by soft tissue such as tendons, muscle or cartilage is the cause of a pinched nerve. The pressure on a nerve interrupts the nerve's normal function and your dog is likely to experience symptoms of pain, weakness in the limbs, numbness or tingling. Injury through over-energetic exercise is one cause of the condition, but it can also be hereditary.