The most prevalent signs of feline polyphagia are as follows: 1. Ravenous appetite (whining and pleading for food). 2. Become aggressive in obtaining food. 3. Taking food from the refrigerator, cupboards, or bowl of another pet 4. Regurgitates (Eating too quickly lead to vomiting) 5. Weight changes (Decrease muscle) 5. Increased thirst 6. Ingesting non-food items, such as dirt 7. Hyperactivity 8. If so, a digestive or endocrine problem is to blame for your cat’s excessive eating.