Why Has My Pet Suddenly Become Ravenous?
A genuine surge in appetite — especially with weight loss — points to conditions like diabetes, thyroid disease or gut malabsorption.
Begging is a habit; polyphagia — a real, sustained increase in hunger — is a symptom. The distinction matters because several diseases drive animals to eat more while their bodies waste: diabetes spills unused glucose into the urine, hyperthyroidism (common in older cats) burns calories at a runaway pace, and intestinal or pancreatic disorders let food pass through unabsorbed. Some medications, notably steroids, ramp up appetite as well.
The telling combination: eating more, weighing less
The single most useful home observation is the pairing of appetite and weight: a pet that eats noticeably more yet loses weight, drinks and urinates more, develops a dull coat or shows changed stool deserves a prompt work-up. Appetite naturally varies between individuals and seasons — growing animals, nursing mothers and dogs in cold weather eat more for honest reasons — so context and trend matter more than any single hungry week.
At the clinic the question usually narrows quickly: blood chemistry, thyroid hormone in cats, urine tests and stool checks cover the main suspects, and managing the underlying condition — insulin for diabetes, thyroid treatment, digestive enzyme replacement — typically settles the hunger too. Before the visit, write down feeding amounts, begging behavior, water intake and weight: a week of notes often does more for the consultation than an hour of recollection.
MediIndex articles are for general information only and are not medical advice, diagnosis, or advertising. Outcomes vary by individual — consult a board-certified specialist for personal decisions.