Black German Shepherd

Hi all,
This is my current WIP a black GSD ,size 12 x 10 inches. She is only a youngster and completely lovely, and we met at one of the local dog shows recently,where she was in awe a bit of all the going ons around her. This is in Graphite again which is an ideal medium for this type of dog being that she is all black all over bar a few hairs on her lower chest. It is taking a little longer than I had expected as I am layering alot to build up the depth of tone, using a H,HB,B,2B and 4B for the very dark bits in Derwent Graphics, which I really love. However I am also using in part a Faber Castell clutch pencil, Gripmatic which is a new experience for me, and so far I quite like it, although I was advised to get a Staedler one as they aare supposed to be better,so methinks a bit more testing is in order.