This is nice progress.
The main problem is that their is no volume. All of the colors in the right spot, but they aren't help "carve" the figure of the animal. The question is how to fix this? I know I end up with the same results with most of my stuff. How do you show that the fox is a tangible element, with depth? I'm pondering sculpting.
I do like how your color transitions work in the dark part of the tail. It seems like it might be abrupt in some parts though (around the neck especially).
Hope this helps somehow.