Well, if you have the stuff outlined on drawfurry.com down, you might want to try getting a character design book, or go to a class.
What it really means though is research as well as mixing styles and varying degrees of realism. And there is no real tutorial for this other than doing it on your own.
As for tutorials, I've not seen any on style per se more than on color and art.
Try googling animal caricature and here are some books that may be interesting.
http://store.doverpublications.com/0486274268.html
One reason I don't drink is that I want to know when I am having a good time. -Nancy Astor