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.
1 Shaking is often a symptom of fever. 2  Ear infections due to mites, ticks or hair inside the ear can cause dogs to shake their heads vigorously. 3  Dogs shouldn't be exposed to the cold, as they can shake and tremble when they're feeling cold. 4  Loss of balance can also trigger tremors in dogs.