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.
As dogs get older, some develop tremors in their hind legs. Sometimes, the tremors may be in the front legs, as well. These tremors usually don't affect how your dog moves or walks. It's easy to assume that symptoms like shaking legs are due to your dog just getting older. But trembling can also be a sign of other issues such as pain. So, always talk to your vet if your aging pet develops tremors. Poisoning. Several toxins or poisons can cause tremors or shaking in dogs. Some of these are harmless to people but toxic to your pet.