wow............... I'm kinda dumbfounded by just how amazing this is. The shading is amazing the texture is wonderful giving her a more real look without making it look weird. What more do I have to say other than this is just amazing!
It's a mix of Photoshop's bristle brush, and the hard brush. It's how I use the brush and the way I do my brush strokes that overlaps the bristles to make it look like fur. Then I go in with a hard brush and manually add in stray pieces of fur here and there so it isn't completely even. I found this technique by experimenting.