Looking around, I could not find any good references for the direction fur should be going in on canines. However, I have this lovely book that I purchased from my local library after it was withdrawn from the shelf. It is titled "The Wolf: The Ecology and Behavior of an Endangered Species" by L David Mech (1970). I remembered seeing a fur slope diagram within it, and decided to scan it in. I admit that I made some minor adjustments to the flow of the inner ear, inner forearms, and tail (extended) for clarification.
I otherwise lay no claims to this diagram in any way, shape, or form. "Line illustration(s for this book [The Wolf]) was prepared by the Graphic Arts Division of the American Museum of Natural History." Please do not heavily edit or repost without giving credit as above.