So, one of our three critters successfully dispatched a rodent.

The unlikely suspects:

1) Sandy, an eight-year old, 10 lb long haired dapple dachshund who has some predatory instincts, but to her owner's knowledge has never actually caught anything.

2) Hazard, a partially deaf, extremely chill cat my roommate found wandering as a kitten in the middle of the road. He still has fighting instincts when cornered, but apparently doesn't notice anything from keys jangling to vacuums. He did, however, freak out majorly from fireworks, so he might have some hearing in unusual ranges (maybe even the rodent range).

3) Ash, the kitten I adopted from the shelter long before his mom would have taught him how to hunt. He's much more of a "cat", and has always enjoyed thrown or moving toys and attacks them viciously, but usually would then bring it back for me to throw again. It could have been him, but if it was I think I would have woken up to the rodent on my bed, deposited there because it stopped playing but Mommy can throw things and make them move again.

It wasn't eaten, just killed. All three critters are well-fed, and got treats since we couldn't tell which slew the dragon.