Panting
Dogs don’t have the same sweat glands that humans do. When they pant after a long walk or when the temperature is a bit higher than usual, they’ll do this to regulate and lower their body temperature. It’s their body’s response cooling off method so they don’t overheat.
Eye Movement
There are a couple of ways dogs are similar to humans. For one, their eyes are also used to reflect their feelings. When they’re wide-eyed, it means they’re excited. When their eyes are downcast, they’re either sad or tired. Raising one brow meanwhile could reflect confusion.