Oooh I do like the shading, the choice of colors for the darker tones work quite well.
The flow of the tail is good, and works pretty well with the motion of Flareon's body as well!
I think I have a minor issue with the tail (and I might be wrong on this). I don't know how to fully describe it but I'll try:
-The shading of the tail feels like it doesn't portray the way Wind effects Fur?