How do you say hello in dog language and what are some other common greetings used by dogs?

Dogs typically greet each other through body language and vocalizations. A common way dogs say hello is through a play bow, where they lower their front end while keeping their hind end up, signaling friendliness and readiness to play. Other common greetings used by dogs include sniffing each other's rear ends, wagging their tails, and making soft, friendly vocalizations such as whining or barking.