Cute, but unless you were going for it, your fennekin's base is too thick. Fennekin's body is quite slim throughout the whole body, and they look bottom-heavy.
Additionally, try to pay a little more attention to the placement of the ears. The far ears look like they're closer to the front of the face than the closer ones. Maybe it'd make more sense if they pointed the same direction, too. The butt-fluff might benefit from a little extra emphasis, too.
Overall it's nice, though. The colours are vibrant and the shading's clean.

Thank you!