Over the tens of thousands of years that humans have been living with and domesticating animals, we have grown to be a species that is very intertwined with our pets and other domesticated animals. Much of these bonds come from the apparent communication that occurs between people and their pets, but is this true communication? There have been many animals to learn some form of communication with their handlers, but in many cases it would appear to be a simple case of conditioning, when the animal does something, they are rewarded. On the other hand, there are instances of animals actually communicating, through body language and/or noises. Can you really argue that a cat hissing at you ferociously, while puffing up, backing into a corner, and swiping at you, is not trying to tell you that it is upset? Can you really say that a dog grabbing his ball and dropping it in your lap is not a dog telling you that it wants to play? Communication and language don't necessarily mean words and letters specifically. There are completely understandable ways of communicating without using words, one can go their entire life communicating effectively without ever muttering a word. Why does that have to be any different regarding communication between animals and humans?