| How often cats should see a vet | At least once a year; twice yearly for cats over 10 (American Association of Feline Practitioners) |
| Normal resting respiratory rate | 20–30 breaths per minute (General veterinary reference) |
| Normal body temperature range | 100.5°F – 102.5°F (38.1°C – 39.2°C) (General veterinary reference) |
| Most common emergency in male cats | Urinary blockage (urethral obstruction) (ASPCA Animal Poison Control / general veterinary guidance) |
| Age cats are considered "senior" | Typically 10–11 years and older (American Association of Feline Practitioners) |
Why Cats Are Hard to Read When They're Sick
Cats are instinctively wired to conceal weakness. In the wild, showing vulnerability invites danger — so even a domesticated cat may appear perfectly normal while dealing with significant discomfort or illness. This survival instinct is one reason cat owners often miss early warning signs until a condition has progressed.
Understanding what "normal" looks like for your cat is the first step. Changes in behavior, appetite, or physical appearance that seem minor in isolation can be meaningful when viewed together. If something feels off, it often is worth investigating. For a deeper look at how cats mask discomfort, see our guide on why cats hide pain.
| How often cats should see a vet | At least once a year; twice yearly for cats over 10 (American Association of Feline Practitioners) |
| Normal resting respiratory rate | 20–30 breaths per minute (General veterinary reference) |
| Normal body temperature range | 100.5°F – 102.5°F (38.1°C – 39.2°C) (General veterinary reference) |
| Most common emergency in male cats | Urinary blockage (urethral obstruction) (ASPCA Animal Poison Control / general veterinary guidance) |
| Age cats are considered "senior" | Typically 10–11 years and older (American Association of Feline Practitioners) |
Behavioral and Physical Warning Signs
Cats communicate illness through subtle shifts in routine. Watch for any of the following:
- Changes in appetite or thirst: Eating noticeably less — or more — than usual, or drinking significantly more water than normal, can indicate conditions ranging from dental pain to kidney disease or diabetes.
- Altered litter box habits: Straining to urinate, blood in urine, diarrhea lasting more than 24 hours, or going outside the box can all signal medical problems. A male cat straining to urinate is a potential emergency.
- Hiding or withdrawing: Seeking isolation from people or other pets is a classic sign that a cat is not feeling well.
- Changes in grooming: Over-grooming (creating bald patches) or under-grooming (a dull, matted, or greasy coat) both warrant attention.
- Unexplained weight loss or gain: Significant changes in body condition, especially in senior cats, should be evaluated promptly.
- Vomiting or retching repeatedly: Occasional hairballs aside, frequent vomiting is not normal and deserves a vet call.
- Labored or rapid breathing: Any unusual breathing — open-mouth breathing at rest, wheezing, or visible chest effort — is urgent.
- Lethargy: A cat that is unusually still, unresponsive to play, or sleeping far more than usual may be telling you something is wrong.
Lethargy
A state of unusual tiredness or low energy that goes beyond normal resting. A lethargic cat may be unresponsive to stimuli it would normally react to, such as food, toys, or familiar people.
Urethral obstruction
A blockage in the urethra (the tube that carries urine out of the bladder) that prevents urination. It is a life-threatening emergency most commonly seen in male cats and requires immediate veterinary care.
Hyperthyroidism
A condition in which the thyroid gland produces excessive thyroid hormone, commonly seen in older cats. Signs can include weight loss despite a good appetite, increased thirst, and restlessness.
Over-grooming (psychogenic alopecia)
Excessive licking or grooming that leads to hair thinning or bald patches. It can be caused by skin irritation, allergies, pain in a specific body area, or stress.
When to Call the Vet — and When to Go Immediately
Not every symptom requires an emergency visit, but some signs should prompt a same-day call to your veterinarian. As a general guide:
- Call your vet promptly if your cat has had reduced appetite for more than 24–48 hours, is vomiting more than once or twice a day, has loose stools persisting beyond a day, or is grooming abnormally.
- Go to an emergency clinic immediately if your cat cannot urinate, is breathing with difficulty, is unresponsive or collapses, has a suspected poisoning, or is bleeding heavily.
When in Doubt, Call Your Vet
Veterinary practices would rather answer a call about a symptom that turns out to be minor than have an owner wait too long on something serious. Most clinics offer phone triage guidance to help you decide urgency. If your regular vet is closed, look for a 24-hour emergency animal hospital in your area. Never wait more than 24 hours if a cat has stopped eating entirely, and seek emergency care without delay if breathing is abnormal.
Senior cats — generally those over 10 years of age — have a higher baseline risk for conditions like hyperthyroidism, kidney disease, and arthritis, which may present with only subtle signs. For more on supporting aging cats, visit our article on keeping an older cat comfortable. It's also worth reading up on common cat health myths so misconceptions don't delay care.
This article provides general health information for educational purposes only and is not a substitute for professional veterinary advice. Always consult a licensed veterinarian if you are concerned about your cat's health.