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Hime, the "highly-trained cat", jumps through a hoop and knocks a vase off a counter to obtain a snack. Once she figures out how to open doors, her human will be rendered obsolete.

(Personally, I think "knocking decor off the furniture" is an undesirable skill to encourage, but to each his own I suppose.)

From the YouTube comments:
as3hime: "hi. cats aren't motivated to please their owners, having more self-respect than dogs, but will work for food. we did this at meal times (so only two trainings a day).
hoop: start at ground level and get her to understand she needs to walk through it to get fed, then slowly raise it about 1cm every other day.
box: we carried her through what she was supposed to do and she vaguely began to understand, and then the light came on. this probably took around 40 attempts."