The dog in dreams is a very positive omen, because it indicates friendship between two individuals. The dog is someone who will always be there for you no matter what are the circumstances, therefore if you dream about the dog, then such dream could mean that there is someone in your waking life you can trust. The dog could also show the love and devotion you have for the animals, therefore you dream about it as well. Sometimes the dog could be interpreted as the playful side of your personality. If the dog is angry or attacked you, you will be in danger of being betrayed. Perhaps you shouldnt trust people as much as you did until now.
Read more about dreaming of Dog in other dream meanings interpretations.