My friend's cat got the beetus from being too fat. She had to give it insulin twice a day, which drained her financially, and chained her to be home every night at a certain time, so partying it up was hard to plan. I expressed that I was worried that would happen to my cat, but she told me, "Just don't share entire ice cream cones and bags of Cheetos (her favorite foods, so it happened all the time) with your cat and she'll be fine."  Like who gives that to their pet? I was worried about giving mine cream cheese here and there, like a couple times a year! And my friend was as skinny as they come. I imagine if she was a fat she would just put the cat down, so at least she tried to keep it alive, and the poor thing had the beetus for ten years when it died at around 20.