7 min read · Cats
Cats are masters at hiding pain and illness — an instinct inherited from their wild ancestors. By the time obvious symptoms appear, a cat may already be seriously unwell. Learning to spot subtle changes early can save your cat's life.
In the wild, showing weakness makes an animal a target for predators. Domestic cats retain this instinct, masking signs of pain and discomfort. This means cat owners must be observant of even subtle behavioral and physical changes.
Eating significantly less or more than usual, or sudden increase in water intake (a common sign of diabetes or kidney disease) are red flags. A cat that stops eating for more than 24–48 hours needs veterinary attention.
All cats sleep a lot, but if your normally active cat suddenly sleeps all day, hides, or shows no interest in play or interaction, something may be wrong.
Urinating more or less than usual, straining to urinate, blood in urine, or avoiding the litter box are serious signs. A male cat straining to urinate is a medical emergency — can be fatal within hours.
Unexplained weight changes, especially rapid weight loss, can indicate hyperthyroidism, diabetes, cancer, or kidney disease in cats.
A healthy cat grooms regularly. A dull, matted, or unkempt coat suggests the cat is feeling unwell or is in pain (often from arthritis making grooming difficult).
Occasional hairballs are normal. But frequent vomiting (more than once or twice a week), vomiting blood, or persistent diarrhea require a vet visit.
Cats should breathe quietly and effortlessly. Open-mouth breathing, wheezing, rapid breathing, or labored breathing is always an emergency.
Increased aggression, hiding, excessive vocalization (especially at night in seniors), or sudden clinginess can all indicate pain or illness.
Do not wait — seek emergency care if your cat shows:
Very common in older cats. Signs include increased thirst and urination, weight loss, vomiting, and lethargy. Manageable with diet and medication but not curable.
Overactive thyroid gland, mostly in cats over 10 years. Signs: weight loss despite good appetite, hyperactivity, vomiting. Treatable with medication, radioactive iodine, or surgery.
Increasing in cats, often linked to obesity and high-carb diets. Signs: excessive thirst, urination, weight loss. Managed with insulin injections and diet changes.
Cat "colds" — sneezing, runny eyes, nasal discharge. Usually viral (herpesvirus, calicivirus). Most resolve on their own but can be serious in kittens or immunocompromised cats.
Over 70% of cats have dental disease by age 3. Bad breath, drooling, pawing at mouth, and reduced appetite are signs. Regular dental cleanings under anesthesia are recommended.
Cats with chronic conditions need consistent medication. VetRefill helps veterinary clinics automatically remind pet owners when prescriptions are due for refill — keeping sick cats on track.
Try VetRefill Free