Pumpkin is a high fiber food that provides the body with a good source of the antioxidant beta-carotene. It is a low-calorie and non-meat food that even some of the pickiest cats will consume. This squash also contains one of the highest levels of Vitamin A, a natural antioxidant that is essential for good vision and helps protect against lung and mouth cancers. As a natural fiber source, pumpkin helps regulate the intestines and keeps them in good working order. This means that if your pet has a problem with constipation or diarrhea, pumpkin will help the stool get back to a normal consistency. Pumpkin is also an excellent source of carotenes and B-complex vitamins.