In the world of dreams the rules of reality do not necessarily apply. Each dream is unique and it's a direct link to the soul and spirit. Psychology provides its own theories on what dreams mean, but so did tradition and the study of dreams for thousands of years before any relevant science had developed.
Dream Meanings - Wolf
The wolf symbolises an enemy. If you see a wolf from afar then someone wishes to do you harm, but if you chase the wolf away then you will neutralise some people who wish you harm.