Gray Paper Drawing

I believe I did well with is the nose and eyes of my calico Nevaeh. One thing I need to work on is the different values of the markings on her fur. The right side of her face looks like there are minimal values, but it was just the way the light blocked them. I attempted to draw the individual whiskers. The values of the dark charcoal and the white charcoal mixed, throwing off the value and texture.