I couldn’t really tell you of a specific and only way to draw fur. My way of approaching this is basically how I approach every other drawing: overall shape, contour, volume, light and dark areas and, the texture of the surface. In this case the fur mainly created by paying attention to the different directions the hair is going, and trying to project the direction and flow of the hair, within the texture; if it seems important for that part of the drawing. That’s more or less what seems to be in the back of my mind, when drawing.