Your pup doesn't just use his tail to let you know what's on his mind. It also provides balance when running and swimming and, when he wags it, the tail releases his scent so other animals can know he's there! The more dominant the dog, the higher he will raise his tail to spread his scent.
What Does a Wagging Tail Mean?
Dogs wag their tails for a variety of reasons - the direction and height of the wag can each have separate meanings. Some dogs have tails that hang naturally low to ground while others, like pugs, twirl toward the sky. When discerning what a dog is feeling, you have to take into account the changes to his tail's natural position.
Dogs who lower their tails are usually feeling anxious, afraid or submissive, whereas a tail pointing upward can indicate excitement or arousal. If your furry friend has a tail that's pointing straight out, he could either be curious or aggressive. You've probably noticed how some dogs' tails tend to go perfectly straight when they hear a curious sound or are hunting down a critter in the backyard to play.