A symbol of instincts to be used and guided by conscience.
The dog may also appear as a guard to protect property and defend against attack. He may symbolize a true friend.
The dog is the closest creature that humans come to call “brother.” It may also represent part of the dreamer—for instance, the shadow.
The dog as a pet almost always points to our instinct or loss of instinct, particularly when it is a trained dog, which in this case does not imply cultivation, but rather the destruction of instincts.
The dog is also one who needs to inspect its environment, who looks for and finds information. In the Tarot the two images of “the Fool” and “the Dog” always appear together.
A vicious dog means envy and unscrupulousness. According to Jung, the dog is the undertaker who buries the Corpse.
The dog with its instincts is seen as aiding the process of dying and resurrection (like Anubis in ancient Egyptian mythology). According to Greek mythology, the dog from hell, Cerberus, stands on the border between life and death.
Also may point to fear of rejection—”dog” as an unattractive female.
What Does Dog Mean In Dream?