Also, Warrens of the Ratmen have info on a race of evil Rats. Various rules for the more powerful ones (paticular nests), and then rules for regular ones.
Anyway, in addition to what's already been mentioned, there are a few good ones in the Oathbound book (canine Dovers and reptilian Pickers and Silvers). There is also a game called Ironclaw (http://www.sanguineproductions.com) that features entirely furry characters. It's not d20, but it has a lot of races that you could use.
There are others, too. I have a few lying around for an all-furry d20 world I did.