How sad. It disgusts me the amount of owners that allow their animals to get so obese. Then the animal has all sorts of problems -- hip/back problems, diabetes, etc. Then the animal must go through all the treatment. If they would have just keep them healthy the animal wouldn't have to go through it all and they would save themselves a lot of money.
And it's stupid people who would actually TRY to make their pet obese that is the reason why Guinness no longer keeps a record for highest weight for an animal. Now they measure the length, height, etc. to ensure that the animal that hold the Largest (cat, dog, etc.) record is healthy.
I had a "friend" who's family allowed their cat to become as obese as that poor cat. Their reasoning was that the cat was diabetic (of course!) and already was pretty miserable, they couldn't stand to make him want for food since that would just make him suffer more! That really ticked me off. The poor cat could only go so many steps before he had to lay down. He could barely clean himself. It made me so angry and disgusted. I couldn't believe it wasn't considered cruelty. They made their cat diabetic for crying out loud!