I think that the oven is a two-cat problem. (Possibly even a
two-cats-and-a-human-problem, but maybe not.)
Last night I opened the oven and found myself face-to-face with
a mouse, so I scooped up Perrine and tossed her in that direction.
She immediately headed into the oven for a sniff around but was
too late to catch that mouse, then spent the next forty minutes in
active hunting mode, trying to watch the stovetop, the inside of
the oven, under the oven, the corner under the counter, and the
far side of the fridge, all at once (but she hasn't mastered the
skill of bilocation yet, which was an obstacle).
The problem with the oven is that mice can move from underneath
to inside far more quickly than a cat -- who has to enter both
locations from the front -- can do so. I'm trying to be helpful,
but so far I think the only mouse she's caught near the oven was
by lying silently in wait underneath the oven for a long time and
waiting for one that didn't know she was there.
This afternoon when I was in the kitchen, Perrine walked in,
looked at her food dish for a few seconds, then asked me to open the
oven for her.