Cats–fluffy, small, big–most cats, I asume, like eating wet food. Sometimes the owner will overfeed them. If you do, they will get overweight. People should not feed their cats too much food.

If they do, the cat will get fat. For example, the cat will bulge immediately. making them look hilarious Then when they run, you can just see their stomach just jiggle along as they run. I think this is hilarious.

Overeating can be bad for the cat.  The cat will probably get diabetes, which can harm the cat.  The cat will be unhealthy.  It will probably not live long.

These are the reasons that result when you overfeed cats.