First of all, great job getting me interested in a comic you like!
It's a great little piece. I'd work on the ears a bit, they aren't quite right. It almost looks like a fox Chobit. The chest hair should probably be puffing out a bit more as well, as it does in the comic. Otherwise it's a bit distracting.
That's all I've got criticism-wise. Great color work, and since that was your main focus I'd say awesome job.