[Mysticat]

I did the shading for YOUR outline, not my blueline.
Writing is;
Muzzle a but longer
Eyes smaller
Legs skinnier, but thigh should be thicker.
Also drew light source up in corner, if that would help you at all.

I dont know if it'd help but im adding you to the edit list for this one so you can look at individual layers (Shading layers, i use two) if it'd be easier for you.

How I shade:
For one, i hate the airbrush with a passion for shading. Haha, i can never get it right. XD
I just make a layer underneath the Lines layer named 'Shading'
I then take the pen and just start colouring where the natural shading would be, then when i'm finished, change the opacity to around 50%ish, depending. (Ideally, a medium light grey)
I then add another layer above it (Dark Shading) to do the darker shades; ie, line of the stomach, right under the chest, on shoulder, etc. (You can see its about 2-3 shades darker on the sketch.) Then change that opacity to about 60%-70% (depending on the first one)