This article explains why dogs greet their owners when they come home. The main reason is that dogs are happy to see their humans and want to show how much they've missed them. They use body language, like wagging their tails and panting, to show their happiness. When a dog greets a person, it often picks up something and carries it in its mouth. This is called "object play" and is a way for them to explore their environment. When dogs greet you at the door, they see you as a leader and want to make sure you're safe. They can also smell your emotions and want to give you a hug to show their love.