This is Dodger, this is about the limit as to detail in a photo I can see,
 I think even this will be difficult

After sketching out the drawing, I then begin with the eyes,
this will only be a pencil sketch, not a painting

Nearly there just a little tweaking on the nose, and then a quick work 
over the entire picture to bring it together a bit more....

Dodger, all finished, darkened the darks, lightened the lights, hope you like :)