So I've been focused on bringing the rabbit of Monty Python's Holy Grail into play.
I've tried fury and animal allegiance on the little guys (fury is HARD since he moves around so quickly) but he never seems up to the challenge when I'm near bandit or other NPCs. I really want to see the potential carnage it could inflict if done right. Anyone have any better ideas to get the lil buggers to cooperate? Cheers!

Unrelenting Force them into enemies, and use their velocity to do the damage.

Your going to need a mod. Rabbits would not make a good fighter, stock. If your on the PC, you could use the console to set some parameters on the rabbit that might help.

You might try the ability to have animals fight for you. (Is that in this game, I can't remember if it is a Perk or a Spell or a Shout or a Daily Power or even available).