The dog in dreams is the symbol of love and friendship. If you were called a dog in a dream, then it shows the disrespected you are suffering from. If someone treats you like a dog, then such dream represents the fact that you are abused by someone. There is also a saying that dogs have some kind of connection with the other world that we dont know and they are our angels who protects us no matter what, or even sends some kind of important message. The dogs could also foretell about the animalistic parts of our personalities, where we no longer act like human.
Read more about dreaming of Dog in other dream meanings interpretations.