Seriously remove the beaver's Blade Fury http://www.youtube.com/watch?v=tUyZS6Z_H_s
There is nothing balanced about having a random chance for a beaver to become unkillable (Since you can't hit it), in escapable (It moves faster than you run), and taking 5 blood every second you're around it (It hits you twice), and also aggroes all nearby beavers. And yes I am mad since I just lost a full inventory of stuff that's totaling roughly 400 silver, since it killed me in the water as well as two points in Cloak and Dagger.