Felines have dissimilar appetites due to health, size and the amount of exercise they get. An outdoor feline will generally need more calories as compared to a cat living in a temperature-controlled, comfortable-always home. Kittens need more calories to help their bodies develop and grow. A cat owner needs know with how much a cat normally eats in order to decide if there has been a noticeable increase in appetite.
Unspayed, female cats will become obsessed with eating because they need to increase calories to help their kittens grow inside of them. Expecting felines may have an obvious increase in appetite long before they begin to show physical signs of pregnancy. The pregnant feline may eat far faster than normal, and may become aggressive if someone tries to take the eats away. One to two weeks before giving birth, the appetite should go down however.
Many serious health problems can cause a sharp increase in a cat's appetite. These include hyperthyroidism, or diabetes, where the cat eats and drinks more because of low blood-sugar levels; Cushing's syndrome, a dilemma of the adrenal glands; liver tumors, which can be cancerous; and digestive problems like inflammatory bowel disease. Most of these can kill a cat if left untreated, but all are treatable, particularly if caught early.
A few medications may cause a huge increase in appetite in some cats... These meds include all corticosteroids such as prednisone, betamethasone and hydrocortone. Additional appetite-increasing meds are the antidepressant fluoxetine (Prozac) and phenobarbitol, used to manage seizures. If a feline is on a new medication and has an increase in appetite, inform your veterinarian.
One of the signs of dementia in very old cats is a manifest change in appetite, including begging to be fed at times when the cat is normally sleeping. Other signs of cognitive dysfunction in senor cats are urinary or fecal incontinence, not recognizing family members, and meowing far more often than customary along with problems walking.