For reals, it doesn't even have to be a whole cat.
...That sounded wrong.
Anyway, I have a neighbor who rescued a frostbitten, bedraggled little kitten with a badly injured leg, he had to have some amputations done at the vet's and though Admiral Nelson has some battle scars, he's the dearest, cuddliest tri-paw'd, one-eyed, half-tailed thing ever, and sure enough, the judges considered him Best in Class for his personality and demeanor. He didn't just get a ribbon, but a little medal and he did so well at the cat show, that's how come my neighbor decided to get him formally certified as a therapy cat. Now he has a little vest, and alternately a sort of navy uniform one with a pinned-up sleeve, and when humans are dealing with orthopedic surgery, amputations, even just being unwell in general at a rehabilitation facility where my neighbor works, they sometimes get to spend time with him and often feel quite a bit better.
There was an awkwardness when a nurse had a tuna salad sandwich at the charge desk, the Admiral decided to leave his sleeping patient and go inquire if a deserving cat might have a quick bite between watches, a different patient spotted him in his naval uniform and was worried her medication was causing hallucinations, but apart from that, the little guy does awfully good work and is a popular fellow.
All cats are best cat. That is science.