Cat

Q: What is a normal temperature for a cat?

The Merck Veterinary Manual gives 100.5 to 102.5 degrees Fahrenheit, or 38.1 to 39.2 degrees Celsius, for a healthy cat. A genuine fever usually falls between 103 and 106 degrees Fahrenheit. A cat feeling warm to the touch tells you very little, because ear and paw temperature reflect blood flow rather than core temperature.

124 guides about living with a cat, one question each. They cover the things owners actually search at eleven at night: why the cat is drinking more, what the vomiting means, whether that plant is a problem, how much it all costs. Where to start depends on why you are here. If something is wrong, read the emergency triage table below the list first, because a few signs in cats need a vet the same hour rather than the next morning. If nothing is wrong and you are simply trying to understand your cat, the behavior guides are the ones people read for pleasure. Every figure in these guides is sourced to a veterinary school, a veterinary association or the Merck Veterinary Manual, and named on the page. None of it replaces a veterinarian who can examine your cat.

If something is wrong right now, start here

Most of the questions in this collection can wait until morning. A few cannot, and cats are unusually good at making the urgent ones look survivable. The table sorts the common presentations into three tiers, using the wording that veterinary sources use themselves.

Urgency	What you are seeing	Why it is placed there
Go now	A male cat straining in the litter box, going in and out of it, producing little or no urine, crying out	Cornell’s Feline Health Center calls urethral obstruction a true medical emergency, and puts the time from complete blockage until death at less than twenty-four to forty-eight hours. This is the single most time-critical thing on the page.
Go now	Open-mouth breathing, panting, or obvious effort to breathe	Cats almost never pant. Cornell states that any cat showing breathing difficulty is at high risk of dying if it is not treated promptly, and Merck notes that open-mouth breathing appears last, after substantial lung function is already gone.
Go now	Any contact with a lily, including chewing a leaf, licking pollen off the coat, or drinking vase water	The FDA states that the entire plant is toxic and that if treatment is delayed by 18 hours or more, the cat will generally have irreversible kidney failure.
Go now	Sudden weakness or paralysis in the back legs, usually with crying and cold feet	Cornell links this to a clot thrown from a heart with hypertrophic cardiomyopathy. It is painful and it is an emergency.
Go now	Collapse, unresponsiveness, or a seizure lasting more than five minutes	VCA states that collapse should always be treated as a medical emergency, and that a seizure beyond five minutes or several in quick succession requires immediate treatment.
Go now	String, thread, tinsel or dental floss seen hanging from the mouth or anus	A linear foreign body saws through the intestinal wall as the gut bunches along it. Do not pull it. VCA describes the resulting peritonitis as life-threatening.
Call today	Vomiting or diarrhea that has continued past six to twelve hours, or any blood in the stool	That is the point at which VCA tells owners to contact a veterinarian rather than keep waiting.
Call today	A cat that has not eaten for a full day	Cornell notes that anorexia can severely affect a mature cat’s health if it persists for as little as 24 hours, and VCA describes hepatic lipidosis following three to four consecutive days without eating.
Call today	Hit by a car, a fall, or a fight, even if the cat seems fine	VCA is explicit that a cat should be assessed even when it appears normal, because internal injuries are not visible.
Watch and note	Drinking noticeably more, eating more but losing weight, sneezing, a new lump, hiding more than usual	These deserve a written record with dates rather than a same-day drive. Take a photo, weigh the cat if you can, and bring the notes to the appointment.

Two numbers worth saving before you need them. The ASPCA Animal Poison Control Center is 888-426-4435 and the Pet Poison Helpline is 855-289-0358, both listed by Cornell’s Feline Health Center. Both charge a consultation fee, both operate around the clock, and both will talk to your veterinarian directly.

If you are trying to work out whether a specific food, plant, oil or cleaning product is a problem, the cat food and toxin safety checker answers that one lookup faster than reading a guide.

What normal looks like, in numbers

Half the worry in this collection comes from not knowing the baseline. A cat breathing forty times a minute means nothing if you have never counted a healthy one. These are the reference figures veterinary sources publish, with the caveat that a single reading taken while a cat is annoyed with you is not a diagnosis.

Measure	Normal for a healthy adult cat	What to do with it
Body temperature	100.5 to 102.5°F 38.1 to 39.2°C	Merck’s reference table. A true fever usually sits in the 103 to 106°F range. Ear temperature is not the same measurement and runs unreliable.
Resting breathing rate	15 to 30 per minute	Cornell’s figure for a resting cat; Merck’s clinical table allows 16 to 40. Count for 15 seconds and multiply by four.
Sleeping breathing rate	Under 30 per minute	This is the one number worth learning to take at home. VCA calls a sleeping rate consistently above 30 abnormal, and it is how cardiologists ask owners to monitor heart disease between visits.
Heart rate	120 to 140 at rest	Merck’s resting figure. In a clinic the same manual gives 150 to 220, because the cat is frightened. Do not panic over a fast heart rate measured at the vet.
Water intake	About 4 oz per 5 lb per day	Cornell’s guidance, which works out at roughly one cup a day for a ten-pound cat. International Cat Care treats more than 100 ml per kg per day as genuine excessive thirst.
Urine produced	10 to 20 ml per kg per day	Merck’s reference range. Litter clumps that suddenly double in size, or shrink to nothing, are the version of this you can actually see.
Time without food	24 hours is already too long	Cornell puts the threshold for concern at a single day in a mature cat. A cat is not a dog and cannot safely fast.
Body condition score	5 out of 9	The WSAVA and Purina nine-point scale. You should feel ribs under a thin layer of fat and see a waist from above.

Sources: Merck Veterinary Manual reference tables for rectal temperature, resting respiratory rate, resting heart rate and urine volume. Cornell University College of Veterinary Medicine Feline Health Center for hydration, respiratory rate and anorexia. VCA Animal Hospitals for home breathing-rate evaluation. International Cat Care for the excessive-thirst threshold. WSAVA and Purina Institute for the nine-point body condition score, where 5 is ideal for cats.

The two figures with the biggest gap between what people assume and what sources say are breathing and thirst. A cat sleeping at 36 breaths a minute is a reason to call a veterinarian even if it seems comfortable, and a cat that has quietly started emptying the water bowl is showing one of the earliest signs of kidney disease, hyperthyroidism and diabetes alike.

The thing almost every owner gets wrong: acting normal is not the same as being fine

Look at the titles in this collection and one phrase keeps surfacing. Pooping blood but acting normal. Drinking a lot but seems happy. Losing weight but still playing. That pairing is not a coincidence, and it is not reassurance.

Cats descend from a small solitary predator that is also prey. An animal that limps visibly gets eaten, so the instinct is to carry on looking unremarkable for as long as the body allows. A cat with early kidney disease grooms, purrs, greets you at the door and jumps onto the counter. By the time it stops doing those things, the disease is usually well advanced, which is why so much feline medicine is about catching the quiet signs rather than the dramatic ones.

The quiet signs are almost all changes in a routine rather than symptoms in the medical sense. Sleeping in a new place, usually somewhere lower down or harder to reach. Sitting hunched with the feet tucked and the tail wrapped tight. Grooming one patch bald, or stopping grooming entirely so the coat goes greasy along the spine. Skipping the top of the wardrobe it has jumped to for six years. None of those will show up in a search for symptoms, because the owner does not think of them as symptoms.

Weight is the exception that you can actually measure, and it is the most useful thing an owner can track at home. A cat that drops from 11 pounds to 10 has lost around nine percent of its body mass, which in human terms is a stone and a half. Nobody notices that visually on an animal wearing a fur coat. A kitchen scale and a note on the calendar once a month will catch what your eyes will not.

The practical version, and the reason this collection is arranged the way it is: treat a change in habit as the symptom. If your cat has started doing something it did not used to do, or stopped doing something it always did, that is worth a note with a date on it, even when the cat looks completely well while doing it.

What changes at each age, and how often a vet should see them

The American Animal Hospital Association and the American Association of Feline Practitioners cut the whole of a cat’s life into four stages in their 2021 guidelines, replacing an older six-stage scheme that is still floating around online. Four is the current one, and the ages are worth knowing because the recommended screening changes with them.

Life stage	Age	What the guidelines ask for	What is actually happening
Kitten	Birth to 1 year	The vaccine and deworming series, then a first adult exam. Sterilization by five months.	Eyes open at 7 to 10 days. The socialization window runs from 2 to 7 weeks and closes early. Weaning at 5 to 8 weeks. All 26 baby teeth are through by about six weeks, and 30 adult teeth replace them by around six months.
Young adult	1 through 6 years	A minimum of one examination a year.	The quietest stretch, and the one where weight creeps on unnoticed. This is where obesity is prevented rather than treated.
Mature adult	7 to 10 years	Annual exam, with the full blood, urine and thyroid panel every one to two years.	Dental disease and early kidney change tend to appear here, both without obvious symptoms. Arthritis begins in far more cats than are diagnosed with it.
Senior	Over 10 years	An examination at least every six months, with bloodwork, urinalysis, thyroid, kidney indices including SDMA and blood pressure at least yearly and preferably twice.	Kidney disease, hyperthyroidism and hypertension are the common three, and all of them are picked up on a blood test long before an owner sees anything.

Source: 2021 AAHA/AAFP Feline Life Stage Guidelines, which define the four stages and set the diagnostic testing schedule for each. Kitten development figures from the Merck Veterinary Manual and the Cornell Feline Health Center; tooth counts from Cornell. Sterilization timing from the Veterinary Task Force on Feline Sterilization, whose Fix by Five position is endorsed by the AAFP, the AAHA and the AVMA.

On lifespan, two university sources point in slightly different directions and both are worth knowing. Texas A&M puts a freely roaming cat at 2 to 5 years against 10 to 20 for an indoor cat. A UC Davis study of more than 3,100 cats found that indoor and indoor-outdoor cats did not differ significantly, and that the variable which really moved the number was sterilization: a median age at death of 10.5 years for spayed females and 9.8 for neutered males, against 4.7 and 3.7 years for intact ones.

The words on the invoice, translated

Veterinary discharge notes are written quickly, by someone who uses these terms twenty times a day. Here are the ones that turn up most often across the guides below.

Term	What it means	Why it comes up
Obligate carnivore	An animal that cannot meet its nutritional needs from plants, whatever the plants are.	It is the reason a cat cannot be fed a vegetarian diet the way a dog sometimes can, and the reason so many human foods are pointless rather than nourishing for them.
Taurine	An amino acid cats cannot make in useful quantities and must eat.	A deficiency causes heart failure and blindness. It is why commercial cat food is supplemented and why home-cooked meat alone is not enough.
FLUTD	Feline lower urinary tract disease, an umbrella term for bladder and urethral problems.	The one that becomes an emergency in male cats, because their urethra is narrow enough to block completely.
Hepatic lipidosis	Fatty liver, caused when a cat stops eating and mobilizes fat faster than the liver can process it.	It is why nobody in veterinary medicine is relaxed about a cat skipping meals, and why overweight cats are at higher risk than thin ones.
FVRCP	The core combination vaccine: feline viral rhinotracheitis, calicivirus, panleukopenia.	Three diseases in one injection, which is why the abbreviation appears on the invoice instead of the names.
Panleukopenia	Feline parvovirus. Not the same virus as canine distemper, despite the nickname.	It explains the confusion behind two of the most-searched questions in this collection, about distemper and about parvo in cats.
Zoonotic	A disease that can pass between animals and people.	The honest answer to what you can catch from a cat is a short list, mostly involving scratches, litter trays and fleas rather than the air.
Body condition score	A structured way of scoring body fat, from 1 to 9, where 5 is ideal.	More useful than weight alone, because a healthy Maine Coon and a healthy Siamese have nothing in common on a scale.
Polydactyl	Born with extra toes. Most cats have 18, five on each front paw and four on each back.	Common in New England and around Key West, harmless, and the origin of the Hemingway cat name.
TNR	Trap, neuter, return, the standard approach to unowned outdoor cat colonies.	It is the framework behind most of the practical advice on feral and stray cats, and the reason a returned cat has a tipped ear.

Definitions follow standard usage in the Merck Veterinary Manual and Cornell Feline Health Center material. Individual guides carry their own citations for anything numerical.

How this collection works, and where it stops

There are 124 guides above and each answers one question. That is deliberate. A single enormous article about cat health would bury the person who typed why is my cat drooling under nine sections they did not ask for, so the collection splits by the question instead.

Anything numerical is sourced to a veterinary body, a university veterinary school, the Merck Veterinary Manual or a government agency, and the source is named on the page rather than gestured at. Where sources disagree, and on cats they often do, the guides say so instead of picking the tidier number.

What the collection does not do is diagnose your cat or tell you what dose of anything to give. There are no medication doses anywhere in it. Several of the most-read guides exist specifically to say that a common human medicine is dangerous for cats, which is a different job from telling you what to use instead. That decision belongs to someone who can put hands on the animal.

It also stays out of two areas on purpose: it does not recommend a diagnosis from a photograph, and it does not tell you whether to euthanize. Both come up in searches and both need a veterinarian who knows the case.

The tools that pair with these guides are indexed under Pet Calculators, and the dog equivalents of several of these questions live in the Dogs collection.

Which guide do you need?

The guides are grouped below by the reason someone opens this page rather than by topic. Thirteen groups, and the first link you click should usually be the right one.

If your cat is unwell, read the symptom group first and the vet-care group second. If your cat is fine and you are trying to understand it, skip to the behavior groups. If you do not have a cat yet, the last group is the honest version of what it costs.

Something is wrong and you are trying to work out what

These start with the sign you can actually see and work backward. Several of them conclude that the answer is a vet visit rather than a home fix, and say so early instead of burying it under six hundred words.

Start with the drinking guide if you have an older cat and nothing else seems wrong. Increased thirst is the earliest visible sign of three of the most common diseases in cats over ten, and it is the one owners are most likely to dismiss as a hot week.

Parasites, infections, and what you can catch from a cat

Fleas, worms and mites account for a large share of the itching, scooting and sudden diarrhea in this collection. The zoonotic question sits here too, and the answer is narrower than the internet suggests but not zero.

The distemper and parvo guides answer what is really the same question. Feline panleukopenia is a parvovirus, it is not canine distemper, and the nickname cat distemper is the reason two different searches keep leading people to the wrong disease.

Vet visits, vaccines, and getting medicine into a cat

The practical end of ownership. How often to go, what the annual shots actually contain, which human medicines are dangerous, and how to collect a urine sample without losing a finger.

If you read only one of these, make it the human medicine guide. Paracetamol and ibuprofen are not merely unsuitable for cats, they are lethal at doses a well-meaning owner would consider small, and the damage is done before the cat looks unwell.

Food, water, portions and weight

Two thirds of these are versions of can my cat eat this, and the answers split more finely than yes and no. Some foods are toxic, some are simply useless, and a few are fine in a quantity smaller than most people picture.

The dairy guide is the one that surprises people. Most adult cats lose the ability to digest lactose after weaning, so the saucer of milk in every children’s book is a reliable way to produce diarrhea in an animal that will drink it enthusiastically anyway.

Plants, oils and things in the house that are not food

Cats groom everything off their coat, which turns spilled and sprayed products into eaten ones. That single fact explains why the toxicity rules for cats are stricter than for dogs, and why essential oil diffusers keep appearing in poisoning cases.

Lilies deserve repeating outside the emergency table above. The FDA is explicit that the whole plant is dangerous, pollen included, and that the water in the vase is enough. A bouquet delivered to a house with a cat is a genuine hazard rather than a cautious warning.

Reading your cat: what the behavior actually means

The largest group here, and the one people read for pleasure rather than worry. Kneading, staring, slow blinking, the tail position, the twitch during sleep. Most of it has a decent explanation and a few of the popular ones are wrong.

The laser pointer guide is worth reading before your next play session. A chase that never ends in a catch leaves the hunting sequence unfinished, which is why some cats get more wound up rather than less, and why finishing on a physical toy matters.

Behavior you want to stop, and messes you have to clean

Scratching, spraying, refusing the litter box, sitting on the car. The workable fixes here are almost all about redirecting an instinct rather than suppressing it, because the instincts are not optional.

One thing worth knowing before you buy a deterrent: a cat that suddenly stops using a litter box it has used for years is usually telling you about pain or about the box, not about mood. Rule out the bladder before you rearrange the furniture.

Grooming, claws, coat and teeth

Cats groom themselves well enough that owners assume there is nothing to do, and then meet the exceptions: long coats that mat, senior cats that stop reaching their back, ears that need checking, and teeth that quietly rot.

A cat that has stopped grooming its lower back is not being lazy. Reaching that spot requires a flexible spine, and losing it is one of the more reliable early signs of arthritis in a cat over ten, an animal that will not limp to tell you.

How a cat is actually built

The anatomy questions, which are mostly asked out of curiosity rather than concern. Toes, teeth, tails, night vision, and how the sense of smell compares with what a cat can taste.

The taste guide contains the fact that explains a surprising amount of feline behavior: cats cannot detect sweetness at all, having lost a working copy of the gene for it. Nothing they eat is chosen for sugar, which is why sweet treats hold no interest and dairy attracts them for the fat instead.

Age, growth and how long you get

From the first week to the last years. When kittens open their eyes, when growth stops, when a cat counts as senior, and what the conversion into human years is really doing.

Human-year conversion is not a straight multiplication, which is the point of that first guide. The first year of a cat’s life covers roughly the first fifteen human years and the second adds about nine more, after which the pace settles to around four a year.

Heat, mating, pregnancy and birth

The calls that come at three in the morning, usually from someone who did not plan to have kittens. Cats are seasonally polyestrous, they ovulate on mating rather than on a schedule, and they can be pregnant at an age most owners still think of as kittenhood.

Gestation runs about 63 to 65 days, and the AAFP notes that cats can be reproductively active from as early as four to five months. That gap between sexual maturity and what people assume is the reason so many first litters are accidents.

Spaying and neutering

Timing, cost, recovery, and whether it can be done while a cat is in heat. The professional consensus has shifted here in the last decade and a lot of older advice online has not caught up.

The shift is worth stating plainly. The Veterinary Task Force on Feline Sterilization calls for cats not intended for breeding to be sterilized by five months of age, a position endorsed by the AAFP, the AAHA and the AVMA. The older advice to wait until six months predates that consensus.

Choosing a cat, and what one really costs

Breed prices, adoption fees, allergy questions, and the costs nobody quotes in advance. Worth reading before the cat arrives rather than after.

On the allergy question, every one of these guides lands in the same place, and it is not the answer people want. No cat is hypoallergenic. The allergen is a protein in saliva and skin rather than hair, so a low-shedding breed reduces how far it travels without reducing how much is produced.

Questions owners ask before anything else

What is a normal temperature for a cat?

The Merck Veterinary Manual gives 100.5 to 102.5°F, or 38.1 to 39.2°C, for a healthy cat. A genuine fever usually falls between 103 and 106°F. A cat feeling warm to the touch tells you very little, because ear and paw temperature reflect blood flow rather than core temperature.

How fast should a cat breathe?

Cornell puts a resting cat at 15 to 30 breaths per minute. The figure that matters at home is the sleeping rate: VCA considers a sleeping or resting rate consistently above 30 abnormal, and cardiologists ask owners to count it weekly because it rises before a cat looks unwell.

When is a cat considered senior?

Over ten years, under the 2021 AAHA and AAFP feline life stage guidelines, which use four stages: kitten to one year, young adult one through six, mature adult seven to ten, senior above ten. Senior cats are recommended to be examined at least every six months rather than annually.

How long can a cat go without eating?

Not long. Cornell notes that anorexia can severely affect a mature cat’s health if it lasts as little as 24 hours, and VCA describes hepatic lipidosis, or fatty liver, developing after three to four consecutive days without food. Overweight cats are at higher risk than thin ones.

Why is straining in the litter box an emergency for male cats?

Because the urethra can block completely, and Cornell states that the time from complete obstruction until death may be less than twenty-four to forty-eight hours. Frequent trips producing little or no urine, straining, or crying out all need immediate veterinary attention rather than overnight observation.

Are lilies really that dangerous to cats?

Yes. The FDA states that the entire lily plant is toxic, including pollen and the water in the vase, and that kidney failure occurs within 24 to 72 hours of ingestion. If treatment is delayed by 18 hours or more, the kidney damage is generally irreversible.

Where these figures come from

Every number on this page traces to a veterinary school, a veterinary association, the Merck Veterinary Manual or a government agency. Where two of them disagree, both are shown above rather than averaged into something neither says.

Emergencies and urinary blockage

Cornell University College of Veterinary Medicine, Feline Health Center, on feline lower urinary tract disease and on difficulty breathing. Read Cornell on FLUTD

Reference ranges

Merck Veterinary Manual tables for rectal temperature, resting respiratory rate, resting heart rate and urine volume. See the temperature table

Breathing rate at home

VCA Animal Hospitals on home breathing-rate evaluation, the source of the sleeping-rate threshold of 30. How to count it at home

Life stages and screening

2021 AAHA/AAFP Feline Life Stage Guidelines, which define the four stages and the diagnostic schedule for each. Read the life stage definitions

Lily toxicity

U.S. Food and Drug Administration, on which lilies are dangerous, which parts, and the 18-hour treatment window. Read the FDA advisory

Hydration and body condition

Cornell Feline Health Center on daily water intake, and the WSAVA nine-point body condition score chart for cats. See the WSAVA chart

Five tools sit alongside these guides and each does one piece of arithmetic the articles deliberately leave out: the cat food and toxin safety checker, the cat age converter, the vaccination schedule, the pregnancy due date and the cost estimator. They work the way everything on waldev.com does: a stated method, visible on the page, with the questions around it answered separately rather than crammed into the tool.

Veterinary disclaimer: these guides describe published veterinary guidance and research for general information. They are not veterinary advice, they cannot examine your cat, and nothing here should be used to start, stop or change a treatment or to give any medication. Cats hide illness well and deteriorate fast, so when a guide and your instinct disagree, call a veterinarian. If your cat is straining to urinate, breathing with an open mouth, collapsed, seizing, or has had any contact with a lily, stop reading and go now.