 Apples, especially their whole fruit form, are often recommended by nutritionists as a way to curb hunger cravings. In fact, one study concluded that participants who ate fruits in their complete form, not juiced or pureed, felt fuller and more satisfied. Can cats eat apples? The truth of the matter is, fruits are not part of a cat's natural diet. Cats are carnivorous and having too much sugar, yes, even natural sugar found in fruit, and a cat's diet can cause digestive or diabetic issues over time. It's ultimately recommended to not feed cats apples in large quantities, especially as a meal replacement.