Above is the detail on the muzzle that I have laid in over the value drawing, minus the final whiskers. One of the most challenging aspects of drawing for me, is the need to constantly and consciously fight the urge to execute every tiny, little detail. Over time I have learned a bit --just a bit -- about the importance of suggesting detail, rather than drawing every excruciating grain of sand, piece of hair, or thread in the fabric. Upon stepping back and assessing this horse's muzzle, I was (am) unsure as to whether I have successfully limited the level of detail. As I carry on and build details in the other areas of the image, I will be better able to evaluate this. Given that it is drawn on Uart sanded pastel paper, softening and blending the level of detail can easily be done.
So, back with my nose to the grindstone -- or in this case, the sandpaper.