i know this is off-topic, but where did you get the sig? i see it all the time and it's freaking awesome. Anyway...if rabbits are killable outside i want bats in the dungeons. And not any bats, either. High-gliding bats that you have to have ranged attack, magic attack, or leap to reach.
I like the idea of having the bunnies transfom after a certain number of bunny kills.
I'm sorta looking at a secret "critter" level. So if you kill 20 deers, the 20th deer would drop an item, which if combining is possible (like the horadric cube, forgot how to spell it), you could open up a portal of some kind to demon deers (that rhymes as well). So you can get demon deers, demon bunnies, and demon toads.
What would also be seriously awesome is if the 20th bunny you kill you get an item, and the item you have you can summon a demon bunny ti fight for you. But these are just wild speculations. But I really want some shocking/funny thing to happen after killing a specific number of critters. Maybe a screamer.
14:09 of Gameplay - Besides from there being cute bunnies in Diablo 3, critters don't die. Man, I always liked killing critters in starcraft. This image is the Witch Doctor throwing a random fire ball which directly hits a critter, but the critter recieves no effect.
What Bashiok said
This was unfortunately a bug that existed in the build that was being used to record the gameplay video. Those critters die, and there's nothing more satisfying than seeing a bunny corpse flung across the screen. It just wasn't working for the demo, which stinks.