Shivering in a young dog vs older where it may be pain is 'fear' As the thread started out with a young dog, I was wondering if you can recall the circumstances before the actual shivering. Also remember that dogs' noses can be 10,000 times stronger than ours, hearing 'way better', and recall the animals that could tell when a tsunami hit, or bad storm, (barometric pressure for example or thunder way, way out there) the vibrations: of a train, a gun shot, a backfire of an engine, the list can go on. The fear is just something they are not understanding as it is not a (sound) that they are sensitized to, esp young dogs in a new home (up to a year….) Hope this helps (here is a link http://dogs.about.com/od/dogbehaviorproblems/a/signs-of-fear-in-dogs.htm )