When you see the deer in a dream, then such dream foretells about harmony, innocence, beauty and elegance. The dream about deer indicates many feminine aspects of the dreamer, where the one uses the beauty and grace as the tool to success. The deer that is black indicates your wish to get rid of all the feminine factors. Perhaps you do not feel comfortable being the woman. If you were hunting for a deer and killed it, then it means you are no longer in connection with being a woman.
Read more about dreaming of Deer in other dream meanings interpretations.