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.
Watch a dog sleep and eventually he will start to twitch, leaving you to wonder if he is dreaming of chasing rabbits across the yard. If a dog twitches or shakes while he's awake, however, things could be a lot more serious. Like people, dogs twitch for numerous reasons. While some are easily explained, others could be signs of a larger illness.