There are probably saber teeth as an item available, in the 'other mods/downloads' board. Also realistically, I don't quite think wolves climb trees any way, and the branches have something called Mesh-collision, I don't know how hard it is to code that sort of thing. If you're looking for a good forest map, try downloading reds map pack it's really nice there. (I need to put it back on)
I know none of the solutions are 'official' but going by Kovu's past record there will probably not be an update for quite a while.