i remember watching an animated movie with a bunch of forest creatures in it. they all banded together (for a reason i cant remember) with an old creature (possibly a rabbit??) i also remember that i think it was the little shrew/mole who discovered her parents were killed by the pollution/gas. Anyone who's got any info on this forgotten memory of mine would greatly be appreciated!

It seems like you are either thinking about Once Upon a Forest or The Secret of Nihm.

I remember that movie. It was called Once Upon A Forest.

You can find it on Youtube. No you wont get Rick Roll'd.

http://www.youtube.com/watch?v=1gZiCUokUzM

Once Upon a Forest