Loyalty, protectiveness. Dreaming of this animal can represent:
For more clues, pay attention to what the animal was doing or any particular characteristic that stood out. A dog can also represent an actual dog in your life, or your inner child (meaning that you could benefit from more attention to your fun, playfulness, or nurturing).
A dog in trouble, sick, or overlooked can mean you may be overlooking a responsibility for yourself or your life.
An aggressive dog can mean you're feeling afraid or threatened (often by a perceived emotional threat) in your real life.