On our food labels we suggest to “Feed according to the age, size, and activity of your cat. If fed alone, feed 1.0oz for each pound of body weight daily. Your cat should have access to clean, fresh water. Refrigerate after opening.”
Cats generally require around 200-250 calories per day, and this largely correlates with 1oz per pound of bodyweight per day total (best fed throughout the day) …But mostly, it comes down to trial and error. We do not believe in counting calories for cats as there really is no correct caloric amount. Unlike many dogs, cats that are eating the right foods will more or less know when it is time to stop eating…the key being that they are eating the right foods…and that would be food with high quality protein and fat found in wet food products as opposed to dry kibble which contains carbohydrates.