It looks kind of flat to me, like in the face is all smooth, instead of having the muscles in the face and the bone behind the eye defined as in the reference photo. The fur looks more like lines not fur. I think with the main edges and direction of fur defined, and then just a hint in a few small patches would look a lot better. A modelling spoon works great for doing muscles and fur.
Here's one of a stag I did a while ago, so you can get a bit of an idea what I mean. It's not perfect, by any means! Looking back, you always notice little things you should have done different.
Keep up the work,' Handy Dave' They say practice makes perfect!