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.
Step 2. Check your puppyâs gums to determine if you can see or feel any signs of teeth. When puppies are about 1 month old, deciduous or baby teeth begin to erupt. Run your finger along the puppyâs gums, and if you feel little bumps, you can estimate your puppyâs age to be around 4 weeks old.