... is at least marginally more likely in this one than it was in another one I saw where two random vermin got hold of the corpse for some inexplicable reason and it was struck by lightning and somehow came back to life in a way which was never adequately explained.

I found it the other day while scouting Redwall fics for my own Redwall DMS pair, especially since one of them's a badger (who is, incidentally, not vermin). However, if you want it, go ahead, I was just saying I remembered the fic and that I'd been planning on using it. And no, the squirrel's definitely a Sue.

Send Agents in and KILL THAT SUE DEAD!