Oscar has gotten a bit chubby lately. Is there a certain amount of food we should give him to cut back on him eating ALL THE TIME? We were free feeding and stopped that a year ago or so and now we have given him 1/4 cup in the morning and again at night. He DEVOURS it! He acts like he hasn't eaten all day so by the morning, after he scarfs it in an hour, he acts like he hasn't been fed for weeks. Does anyone have a weight chart as to which I should be feeding a 4 year old cat? Or does anyone know what I should feed him correctly? Thanks!