>If it's in the open right now, a fast and accurate enough shot might end this right now...
>But that's probably not an option.
>Ask the oni to cover the chamberpot, and cover the dresser exit personally. If the rodent doesn't run by then and there's a clean line of sight, try a quick shot at it. If there's no good way to see, summon/retrieve a familiar to fire from a better angle to startle it.