HartsfieldâJackson Atlanta International Airport has been the world's busiest airport every year since 2000; with all airports combined London has the world's busiest city airport system by passenger count.
Tension or Temperature. Dogs may shake as a way of relieving tension. If a dog is feeling nervous or uncomfortable in a situation, it might shake the whole body as a way of shaking out tension. This behavior also may function as a means of getting attention from other dogs or people.
My dog also yawns when he gets nervous! Another great tip is to have a friend who also has a dog, take you nervous dog to his/her house for a doggie play date. This way, the nervous dog is away from owner and only with 1 other dog.